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I got a bottle of Redline SI-1 and a Gumout all in one. I know people usually recommend just running a concentrated fuel tank every 5000 miles or whatever which would be half a bottle of any of each essentially. I was thinking of doing this for testing purposes and to see if maybe I could clean...

i know its hard to say which is a better oil like lubrication wise. but out of these which is better for cleaning ability and seal conditioning. any ideas? m1 regular syn vs pennzoil platinum vs castrol edge

hello, 2 questions. Looking to find the thickest (at operating temp) as in the viscosity at 100 celcius or the largest HTHS oil thats a synthetic 0W20 for warranty purposes I think redline will probably win this but I am talking about the more easy to find brands as in Mobil 1, pennzoil...

my car has about 100,000 miles on it and about 15 years old and its ran random oil for the last 100,000 miles, whatever the oil change places/dealers gave it which i assume was semi synthetic and maybe conventional. Never had leaks or oil problems. After reading on this forum I went shopping and...