Oil change viscosity 5.7

Answer 1

On a 5.7L engine or 350cubic inch block, your oil cap should specify 5w-30. Any brand will do, they are basically all the same. Depending on the age of your vehicle and if it leaks oil or burns oil, you might want to go thicker. 10w-30 would be the next step up. 10w-40 is not commonly used or recommended for anything anymore but it is still used on older large engines that work in extreme heat conditions. If your vehicle still leaks or burns oil, you could run 10w-40 but just know that because it is thicker, your oil pressure gauge or switch may read higher than normal. My car burns through alot of oil, I run 15w-40, which is what diesel trucks and semi trucks use all the time. Many farm tractors and construction tractors use this oil. 20w-50 is about as high as you can go and still be considered motor oil. If you need 20w-50, your engine might be on it's way out but you could use it until then. 30w, sometimes called straight 30 is not normally used in cars anymore. It is recommended for lawn mowers and small machinery. 30w is NOT a multi-viscosity lubricant like the previously mentioned options. Some additives next to the oil actually help is engine ticking or other problems are present. Slick-50 can be good but also bad. It puts a plastic like coating on the engine parts called Teflon. When you shut down your engine, all the oil drains to the bottom of the oil pan. When you start your engine, immidiately your oil pump turns on and pumps the oil up to the top of the engine and lets the lubricant trickle down. There are always those few precious seconds when there is no lubrication. This is where 70% of engine wear happens is during start up when the oil is at the bottom of the engine. Slick-50 does not drain off. It coats your engine parts. Here's the bad, when you neglect to change your oil at recommended intervals, it gets dirty. When you finally change your oil, the dirty Slick-50 STAYS. If you are going to run Slick-50, be diligent and religious about changing your oil. You can use cleaners to run in your engine for 10 minutes prior to an oil change and these help but your engine will be forever dirty. Slick-%0 is difficult to get out and as a result, may GUM up your engine.