Our readers keep the lights on and the charging cables organized. As an Amazon Associate, I earn from qualifying purchases.
Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
If your oil pressure gauge is hovering lower than it used to, or you are topping off a quart between fill-ups, your engine is telling you it needs help. The right additive can thicken the oil film, reduce consumption, and get that pressure needle back where it belongs — without tearing the engine apart. This guide breaks down the five best formulas for the job, each one chosen because it has real evidence from owners who have used it on high-mileage engines.
I’m Mo Maruf — the founder and writer behind The Tools Trunk. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Whether you are driving a commuter with 200,000 miles or a project truck that bleeds oil, choosing the right additive to increase oil pressure depends on viscosity, compatibility with your engine type, and how quickly you need results — every bottle here has proven itself in someone’s daily driver.
Our Picks at a Glance
How To Choose The Best Additive To Increase Oil Pressure
Not every oil additive is designed to raise pressure. Some are just detergents or friction modifiers that clean sludge but do nothing for a loose bearing. When pressure is the goal, you want a product that thickens the oil film or contains polymers that swell seals. Here are the three factors that separate a pressure fix from a simple top-up.
Viscosity-Enhancing Chemistry
Additives that raise oil pressure typically work by increasing the oil’s viscosity (its resistance to flow). Look for a stabilizer or a viscosity improver rather than a pure cleaner. A thicker oil film fills the gap between worn bearings and the crankshaft, which directly lifts the pressure reading on your gauge.
Compatibility With Your Oil Type
Most modern additives are formulated for conventional and synthetic oils, but a few are designed specifically for high-mileage blends. Check the label for “universal fit” — every product on this list carries that designation, meaning it mixes safely with standard engine oils without causing gelling or seal damage.
How Much Volume You Get
The amount of additive you pour in matters. Some products come as small 300 ml bottles that you add on top of your oil, while others are full-liter jugs that replace a quart of oil entirely. If you have a large V8 that needs a thicker mix, a bigger bottle saves you from buying multiple packs.
Quick Comparison
| Model | Best For | Volume | Effect | Engine Type | Amazon |
|---|---|---|---|---|---|
| Liqui Moly Viscoplus★ Best Overall | Reducing consumption | 10.14 fl oz | Stabilizes viscosity | Universal | Amazon |
| BG RF7 Engine Oil TreatmentTop Performer | Resurrecting old engines | 11 fl oz | Restores pressure | Universal | Amazon |
| Lucas Oil Heavy Duty Stabilizer | Daily heavy use | 33.81 fl oz | Raises pressure | Universal | Amazon |
| Rislone Hy-Per Lube Oil Supplement | Quieting noisy lifters | 32 fl oz (3-pack) | Reduces noise | Universal | Amazon |
| Petron Plus Hi-Performance Stabilizer | High-temperature stability | 15 fl oz | Maintains pressure | Car, Truck | Amazon |
In‑Depth Reviews
1. Liqui Moly Viscoplus for Oil
Our pick — over 4.5★ from 300+ verified ratings; the strongest balance of quality and price.
The 300 ml bottle that turns a thirsty Subaru into a tight sipper.
This is the additive that wins over the most owners for a simple reason — it delivers on the big promise of reducing oil consumption. At just 10.14 fluid ounces (300 ml), it is the smallest bottle on the list, yet buyers report enormous results. The formula is designed to minimize viscosity loss, which is what happens when your oil thins out at high heat and pressure starts to drop. The manufacturer states it provides optimum oil pressure under all operating conditions, and the crowd of nearly a thousand owners backs that up with a strong average score. Performance gets the most praise — ten owners highlight it — and noise level is right behind, with nine calling out how much quieter the engine sounds after treatment.
What gives this pick the edge over others is how efficiently it works per ounce. The volume gap is dramatic — it holds about one-third the liquid of the Lucas stabilizer — but owners mention that a single oil-change interval is enough to notice a change. One buyer’s 2016 Subaru Forester with 150,000 miles on the clock saw its consumption slow significantly after one use. The engine protection aspect scores five positive mentions, suggesting this is not just a quick bandage but something that helps extend motor life.
The only realistic fit-note is that the 300 ml bottle is small. If you have a large engine that needs a full quart replaced, you will need to buy more than one bottle. But for most four-cylinder and six-cylinder cars, this is the one that delivers the highest satisfaction rate per drop. The review pages sum it up: “way less oil consumption than before, definitely cheaper than topping off often.”
Owners love
- Quiets the engine noticeably, as buyers across multiple reviews confirm.
- Reduces the need to top off between oil changes.
One thing to know
- Small 300 ml bottle means larger engines may need two doses.
Reach for this if: you drive a high-mileage car and want to cut oil consumption without tearing anything apart.
Think twice if: your engine burns more than a quart every 500 miles — you will need a bigger bottle to keep up.
2. BG RF7 #107 Engine Oil Treatment
The 11 oz can that resurrected a 280,000-mile Audi and fixed its low-pressure light.
When owners talk about BG RF7, the word that keeps coming up is “quality” — 22 people single it out, making it the most-discussed aspect of this product. Performance follows at 20 mentions, and the reviews back that up with vivid real-world examples. The standout story comes from a buyer whose 2001 Audi A4 with 280,000 miles was throwing a low oil pressure light. They added RF7 with Liqui Moly oil, and the light stayed off for six months straight. Another owner with a 1995 Chevy 350 truck (350,000 miles on the odometer) saw 95% improvement in oil fouling after three oil changes. At 11 fluid ounces, it is slightly larger than the Liqui Moly bottle, giving you a bit more volume for the same price tier.
The formula works well across multiple platforms — cars, trucks, ATVs, and motorcycles — which is why the universal fit type applies here. Engine performance gets ten positive mentions, and noise level adds eight more. Where this product stands apart is the sheer drama of the results: owners describe fixing lights that had been on for months and bringing dying engines back to life. The BG brand carries weight in professional circles, with one buyer noting that mechanics they consult recommend these products. Note that this is more of a rescue than the preventive style of the Liqui Moly Viscoplus.
A small minority mention packaging issues — a few cans arrived with dented lids or leaking fluid because of the bubble mailer shipping. The product inside works; the outer container sometimes does not survive the trip. If you are ordering, be aware that the can is not armored. That said, the effectiveness is so widely reported that most owners call it worth the risk.
What stands out
- Consistent ability to extinguish low oil pressure warning lights.
- Trusted by professional mechanics and fleet operators.
Watch out for
- Thin metal cans can dent or leak during shipping.
Best if: your engine is already throwing a pressure warning light and you need the strongest anecdotal track record.
Look elsewhere if: you prefer a plastic bottle that cannot dent — the Lucas or Liqui Moly containers are more resilient.
3. Lucas Oil 40001 Heavy Duty Oil Stabilizer
The one-liter jug that replaces a full quart of oil and claims to raise pressure directly.
Lucas Oil is a household name in the additive world, and this stabilizer is the largest single bottle on the list at 33.81 fluid ounces (1 liter). The manufacturer explicitly states that it raises oil pressure — that is right on the label — making it one of the few products here that come out and say what they do in plain terms. It also claims to increase oil life by at least 50%, eliminate dry starts, and reduce oil consumption. Owners who use it regularly confirm the effect: one buyer who runs it in every vehicle they service says they use one bottle in place of a quart of oil at every oil change. Another owner, who uses it in race cars, calls it the only oil they run. The bottle is so big that at 33.81 fl oz versus the Liqui Moly’s 10.14 fl oz, one purchase covers most engines without needing a second bottle.
The crowd of over 500 owners gives this a solid average, and the most common praise is that it slows oil consumption greatly. The Lucas brand has been around long enough that buyers trust it for high-stress applications like racing and towing. Because you pour it in place of a quart of oil rather than on top, you are essentially running a thicker oil blend from the moment you fire up the engine. That direct replacement method is what makes this product so straightforward for anyone who just wants to dump in a bottle and forget it.
The honest trade-off is that this stabilizer is a thick, honey-like substance. In cold climates, it can make your oil sluggish until the engine warms up. Some owners with very high-mileage engines find it works best when blended with a lighter oil rather than replacing a full quart. If you live somewhere that sees sub-zero winters, consider using half the bottle and keeping the rest for the next change.
Why people grab it
- Massive 33.81 fl oz bottle covers most engines in one pour.
- Directly claims to raise oil pressure on the label.
What to consider
- Very thick viscosity can make cold starts harder in winter.
Grab this for: pickup trucks, race cars, or any engine where you want one bottle to do the whole job.
skip it if: your car sits outside in freezing temperatures — the thickness may delay oil flow at startup.
4. Rislone Hy-Per Lube HPL201-3PK High Performance Oil Supplement
The three-bottle pack that leaves a protective film on parts even while the engine sits for weeks.
This is the only multi-pack on the list — three 32-ounce bottles that give you 96 ounces total, so you can treat multiple vehicles or stock up for several oil changes. The formula is special because it leaves a protective film on internal engine parts, which means start-up wear is reduced even if the car has been parked for a while. That film is also what helps restore performance in high-mileage engines by better sealing piston rings and valve guides. The viscosity is rated at 15W-50, which is noticeably thicker than standard 5W-30 oil — that thickness is exactly what boosts pressure in worn engines. A longtime owner who has used it since 1980 says it doubled motor life in V8s and small engines alike.
Quality gets 17 positive mentions, and functionality earns 14, making this the second most-discussed attribute. Noise level is another strong point — eight owners mention it, and the manufacturer promises it will reduce lifter and drive train noise. One buyer found that a single pint (half the bottle) quieted a sticky lifter within a day of driving. The pack is also a good value if you compare it to buying single bottles over time: three bottles mean you always have one ready when the oil-change reminder pops up.
The recurring gripe is the bottle cap design — a few customers note that the caps do not seal well and can leak during storage. If you plan to keep the extra bottles in your trunk or garage, check that the caps are fully tightened. The product itself gets consistent praise; the packing is the weak link.
What makes it special
- Three-bottle pack provides enough for multiple treatments.
- 15W-50 viscosity naturally boosts oil pressure in worn engines.
Minor issue
- Caps on some bottles do not seal tightly — check before storing.
Ideal for: anyone with a clattering lifter who wants a thick formula that also protects during long sits.
Not for you if: you only need one bottle — the single-pack version may be a better fit.
5. Petron Plus 12128 Hi-Performance Engine Oil Stabilizer
The 33.81 fl oz bottle formulated to maintain oil pressure specifically at high temperatures.
While other additives focus on cold-start protection, Petron Plus is built for the opposite problem: keeping oil pressure steady when the engine is hot and the oil has thinned out. The manufacturer states it helps to maintain oil pressure at high temperatures, which is a specific claim that makes this a strong pick for anyone who tows, hauls, or drives in desert heat. It also helps reduce oil consumption and quiet a noisy engine. At 33.81 fluid ounces (1 liter), it sits between the small Liqui Moly bottle and the large Lucas jug — a middle ground that works well for most cars. One owner of a 2008 Dodge Ram with 205,000 miles reports the engine got so quiet after using Petron Plus that the dealership could not tell it was running.
Quality gets 13 positive mentions, and gas mileage adds seven more — reviewers point out actual mpg improvements, with one owner seeing a 6-8% increase over two tanks of gas. The flash point is rated at 154 °C, which is lower than the Rislone product but still appropriate for normal engine operating temperatures. A long-term user who has owned many vehicles over 200,000 miles says Petron Plus smooths old engine noises better than other brands they have tried.
The main debate around this product is value. Nine owners mention value for money, and the sentiment is mixed — some say it is absolutely worth the higher price, while others feel the cost has risen too much. One loyal buyer notes that the price climbed from earlier in 2024, making it harder to justify. If budget is a primary concern, the Lucas or Liqui Moly options deliver similar results for less money. But if you need hot-weather pressure stability specifically, this formula is engineered for exactly that condition.
Strong points
- Designed to hold pressure steady under high engine temperatures.
- Shoppers say real fuel economy improvements of 6-8%.
Consider this
- Price has risen, and value opinions are divided among owners.
Choose this for: towing, hauling, or any driving where the engine runs hot for long periods.
Pass if: you just need a cheap pressure boost — the Liqui Moly gives you similar results for less.
Understanding the Specs
Viscosity Grade (SAE Rating)
This number tells you how thick the additive is at different temperatures. A higher number like 15W-50 means the oil is thicker and better at filling worn gaps, which directly raises pressure. Lower numbers like 5W-30 flow faster in cold weather but offer less pressure support in a sloppy bearing. Most pressure-raising additives simply bump up the effective viscosity of your oil by several grades.
Flash Point
Flash point is the temperature at which the additive’s vapors can ignite. Higher flash points (around 190 °C) mean the product can handle extreme heat without breaking down. If you drive a turbocharged car or tow heavy loads, a higher flash point is important — you do not want the additive to burn off before the oil reaches operating temperature.
FAQ
Will an oil additive fix low oil pressure permanently?
How much additive should I pour in?
Can I use a pressure-raising additive in a brand new engine?
Will these additives harm my catalytic converter?
How long does it take for an additive to raise oil pressure?
Can I mix different additives together?
Is the Lucas stabilizer too thick for winter driving?
What is the difference between an oil stabilizer and an oil treatment?
Final Thoughts: The Verdict
If you want one dependable pick, the additive to increase oil pressure winner is the Liqui Moly Viscoplus because it delivers the most consistent owner-reported results in the smallest, most affordable bottle — and it makes engines noticeably quieter while cutting consumption. If you need the largest volume for a big V8 or heavy-duty use, grab the Lucas Oil Heavy Duty Stabilizer. And for a stubborn low-pressure warning light on a truly ancient engine, the BG RF7 has the most dramatic rescue stories in the owner community.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, The Tools Trunk earns from qualifying purchases. This does not affect which products we feature.