changed motor oil last week at 7500miles as recomended. its 15,000 mile oil but its had lik 5 times the cleaning and detergents in it so first time use. watch it and change it when it gets dirty. mine was pretty nasty. but i got it changed and much smoother idle RPM build that stuff works great cleaned my engine out!! no more cold start lifter tick or nothin!!! i recomend this stuff im at 130,890miles!! and still going strong

 

I wonder why they dont reccomend that oil on all engines?

 

CYA... if u clean the gunk out that the engine is use to performing with. as seals that have gone bad over the miles and whatnot this oil will clean out that build up and if u clean out all of that debris it will cause problems.