Lucas OilMotor Oil, High Zinc Break-In, 30W, Conventional, 5 qt Jug, Each

I love using Lucas pure synthetic in my vehicles. It was recommended to me by my mechanic a few years back and I have used it ever since. My vehicles run smooth and I've noticed better gas mileage. I use 20% of the oil capacity and never had issues.

great product, price is good

I recommend this product it works very well.

Good quality oil additive , good price , fast shipping , have ordered from this seller 4 times now with zero problems , and it's delivered right to my door step free , will continue to use this product and order from this supplier.

I add this at every oil change and you can tell the difference at startup and idle. Much smoother and quieter than just synthetic oil. The gallon jug is a better deal and nice to have on hand.

Background: I've been using the "Lucas Heavy Duty Oil Stabilizer" for a few years in my old, high mileage SUV which was used only occasionally for towing a boat and for winter storm driving. It would often sit unused for a month at a time. When started after a long period of no use, the engine would make a horrible, dry, grating, mechanical noise which I knew couldn't be a good thing. So, based solely on manufacturer claims, I started using the heavy duty stabilizer. Much to my pleasant surprise, the nasty gear/bearing noises totally disappeared immediately after my first use of the product and have never returned.Currently: I recently traded in the old SUV on a low mileage, gently used one of a different make. When reading up on my new SUV online, I found out that this particular motor has somewhat of a reputation for a rattling, dry mechanical noise upon cold startup which would last until the engine was warm. It was a sound I heard immediately after the first cold start at home. It wasn't nearly as bad as the sound from the old SUV, but it bothered me none the less. I immediately thought of using the heavy duty oil stabilizer, however, my newer car requires much thinner 5-20W oil, and synthetic oil is highly recommended by the manufacturer. So I bought the "Synthetic Oil Stabilizer" and did a complete oil/filter change and added one quart of the stabilizer. The next day, the engine fired up and didn't even show a hint of the noise I had heard previously. Still no noise 2000 miles later, even after a couple weeks of non-use at a time.When I used the "synthetic oil stabilizer", I noticed it looks and feels totally different than the "heavy duty" stuff. It's thinner, pours easier, and has a clearer, somewhat milky look to it.But does it do EVERYTHING they claim it does? Who knows. But I do know that it eliminated my dry starts in the newer vehicle. I've been tracking gas mileage and haven't really noticed much, if any, difference. But I wouldn't expect much improvement on a type of car that doesn't get great mileage to begin with.Why only 4 stars? The only way to know if the stuff does EVERYTHING they claim, would be to track mileage over a long period of time, do a complete engine tear down, run dyno tests, and compare results with an identical vehicle which didn't get the same oil treatment. Unfortunately, there doesn't seem to be any such tests/comparisons. I think Lucas could do a much better job of proving their claims than they've done up to this point. Until I see some kind of proof with a scientific comparison, or when I tear down my engine at 250,000 miles (which isn't going to happen), 4 stars is the best I can do.However, as I stated, I know it works to eliminate my dry starts. That's worth 4 stars for me.I hope some of this is helpful to you.

I use it at every oil change at a 20% rate, including small four stroke engines.

Ultimate engine protection! Reduces wear, extends life. Trusted Lucas quality!