Hi - it has been quite a while since I was last here.
Right here goes - I am going to get my 87 gt fiero back on the road after moving house and everything has been packed up for the last 3-4 years- so I am going to do an oil change with all the classifications that come with oil nowadays I was looking at using this fully synthetic 5w40 oil

https://www.shell.co.uk/mot...synthetic-5w-30.html

which has the API SL/CF classification.

Will this be ok to use ?

Jon

The 2.8 V6 is not fussy about what brand of oil you use, but the newer formula oils may leak a bit more than the dinosaur stuff.

Thank you Gall.
This is interesting I used to put 10w40 in with no leeks and when I was at my old house I had some valvoline fully synthetic 5w40 oil that I put in the engine and my 5sp getrag and leeks started showing up.
I may switch back to 10w40

Jon