I use 20w50 there are many opinions on what oil. I use castrol gtx.
I would personally not use 10w-40 in any car. a 10w-40 uses too many viscosity index improvers to attain the spread between the weights. A 20w-50, while having the same "30" spread doesn't need as many. It still gets hot in Maine in the summer. I'd do the same that I do here in NY. 20w-50 (I use GTX) in the hot season and Chevron Delo 400 15-40 otherwise and before winter storage.For Maine driving I would recommend GTX 10W40. You will realise better lubrication at startup than 20W50.
Best regards, Elio
7.2 quarts if it all comes out
Oh, be prepared for almost none of the 'low profile' drain pans to fit under there. (hint: try the pan first before breaking loose the plug only to find out you can catch the volumous cascade of ish)
I changed it today with 20w-50 GTX. Have a lift so it was pretty easy.
I'm using it in my '79. So far so good. Watch out for leaks though. It doesn't clot like dino juice. I ended up replacing most of my seals last year before I found that out. Heck some of them were probably 26 years old.Has anyone tried Mobil 1 15W-50 or the extended performance (what ever that is) 15W-50?