I am a Newbie here and This is my second time posting on here with a question. I have just bought a 2004 Chevy Trailblazer with the Vortec 4200 VVT I6 Engine with 153,000 miles on it. I did not get any service records with the vehicle when I bought it so I don't know engine oil change history, I.E. What type of oil used. change Intervals. etc. Even though it does not seem to use any oil I don't know how dirty the inside my engine is, I would like to clean it up just for added insurance. My question is: '
1. I was told even though it is a gasoline engine that running a good quality 15W-40 weight "Full Synthetic Diesel Oil" a couple of times through it would clean my motor up very well just in case it is dirty inside. Yay or Nah? Safe or Not? Thanks for any and all help!
1. I was told even though it is a gasoline engine that running a good quality 15W-40 weight "Full Synthetic Diesel Oil" a couple of times through it would clean my motor up very well just in case it is dirty inside. Yay or Nah? Safe or Not? Thanks for any and all help!