I bought my used salvaged car in what looks to be a very good condition. I do oil changes EVERY 3000 miles, sometimes less. I use 5w-20 like the manufacturer ask. My last oil change was actually done at a quick lube place. they used their stupid over stock 10w-30 and probably crappy oil filter. I‘ll see what oil filter they used today when I do my oil change. (I was busy and asked a friend of mine to get the oil changed)Anyways. I‘ve had this problem for a while now. Now that it‘s getting colder, my engine is starting to knock or click or whatever in the cold morning when I first start up my car. I want to use Gunk Engine Flush and Lucas Heavy Duty Oil Stabilizer. I actually want to start flushing my engine out before every oil change and I want to see if the stabilizer will stop the knocking. I‘ll switch to synthetic on my next oil change to see a difference. Then, I‘ll go back to conventional to see if there really is a difference. What are your thoughts?
For the best answers, search on this site shorturl.im/axXZT If you have the oil and filter changed according to accepted change intervals (3000 - 5000 miles, provided not more than 3 months elapse between changes) you will NEVER need an engine flush, unless you experience a blown head gasket which causes coolant to become mixed with the oil. Engine flushes were commonly needed back in the '60's because the oil additives in use then were much less capable of keeping the bad stuff in the oil in suspension and removing it from the engine oil is drained. With today's type SF and SG oils this simply is not a problem. Hawking engine oil flushes today is akin to selling Snake Oil and only the inexperienced quick lube employees who are brainwashed to sell sell sell believe it is of any benefit in a normal operation and maintainance program. A cooling system flush about every 30 to 50 thousand miles along with the installation of new coolant is good maintainance.
