Polytron Metal Treatment Concentrate Engine Oil Additive, 473 ml

Bar none the best additive for engine health and longevity. Can't say more of how it helps performance and keep engine quiet and cooler while extending oil changes.

I have purchased previously from the WOOT site. Originally purchased a couple of bottles to try out. The first thing I treated was my Honda lawn mower. Having owned it for several years I knew how it ran and the sound when running. Honda engines are smooth and quiet, much more now. Next up was the Onan Emerald Plus generator mounted on the back of the travel trailer. It is the old style unit before the OHV engine model currently in production. Always could tell in the trailer the unit was running due to a small transmitted vibration. Also under heavy use the generator would use close to a quart of oil over five to six weeks. Now the only reason for knowing the gen set is running is the slight sound of the exhaust and there is no oil consumption over the same amount of use. Next was the pickup. 2007 Chevrolet Silverado dually with an 8.1 big block engine. Living in the Phoenix area, we have made numerous trips back east pulling the trailer. Many rips have been the same regarding destination and route. The truck has always used 1.5-2.0 quarts of oil for 3,000-3,500 miles. This spring we traveled 6,000 miles using less than a quart total. Engine is smoother also. Treated the Allison transmission, transfer case, rear axle and power steering. Trans shifts smoother running 30-40 degrees cooler, power steering is really slick and transfer case transitions more smoothly. This all pulling 12,000-13,000 lbs. Mileage increased 1.5 mpg. Also treated the wife's DTS with a high output Northstar engine, trans axle and power steering. Always a smooth running car but now even more so. Mileage on the highway increased by 3.5 mpg. I am very pleased with the results I have had using this product. Ordering more for the next oil changes.

Great product that has significant results! I had previously been using STP ultra in my vehicles the past 4 years which was an alright product. But after adding Polytron in my 2001 Infiniti QX4 instead, I have noticed a big difference in engine performance. The engine sounds more quiet and feels much smoother as well as improved fuel economy and restored HP. I like the fact that it cleans the engine and keeps it clean from sludge and other deposits, not to mention that it treats the metal of the engine reducing friction, as opposed to other brands of oil additives which usually just treats the oil. You wont get results instantly but you will notice the difference after putting at least 50 miles or so after you add polytron. Great if you have a lot of mileage on your vehicle. I would reccomend this product.

I put 1/3 of the bottle in a 2012 Odyssey and 1/3 in a 2005 Suburban 1500 (5.3 ls). The Suburban and Odyssey already had half a bottle each of Slick50 in them, with synthetic mobil1. On the first drives after adding it, their idling RPMs dropped by about 50-100rpms each. On the Suburban (230,000 miles), the already deep and pleasant, "nah nah nah" sound of the idling motor was replaced by an even deeper "wa wa wa" sound that tricked a longtime multiple 5.3ls engine owner into insisting that I actually had bigger 6.0 motor, based on the sound alone. I also don't hear any more higher pitched rattling or scrapey noises when the motor starts, and so my 20 year old motor with nearly a quarter million miles, that was a cheap restored salvage vehicle anyways, now sounds amazing. So...I'll likely keep buying more of this as I now think it actually helps.

Been using polytron for years. No way to quantify if its really extending my motors life, but I've never had issues when treating with it regularly. I trust the science behind it and it can only help.