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Preston
05-11-2008, 07:59 AM
Alright guys....I'm new to owning a 87 gn so give me the scoop on what weight,brand of oil and if there is additives needed.

I live up north in NewHampshire and the temps I will probably encounter before storing is about 40*F to and yes it does get into the 90*F

pfredricks
05-12-2008, 04:19 PM
Alright guys....I'm new to owning a 87 gn so give me the scoop on what weight,brand of oil and if there is additives needed.
I use Mobil 1 5-30W. After rebuilds during the break in period I use plain old conventional 30W with no detergents and add some ZDDP, or what used to be called Engine Oil Supplement from GM. Ya can't get it from GM anymore, but many vendors offer it, but its $$$. For off road use only :brows:

There's lots of rants about engine oil on all the boards. :deadhorse

To me they are all good if they have the high SAE rating. I avoid the additives except during breakin.

413turbo
05-12-2008, 04:59 PM
i use synthetic or blend. i think castrol blend 10-40w right now. lucas oil stabilizer. never any other additives. and allways an ac/delco filter.