[gmc1990rodder]

i have a '72 400ci sbc with everything as is from factory....what grade or weight of oil should i be using in this? btw i live in north central FL as far as climate goes..and this is a daily driver an opinion appreciated

[cobalt327]

Originally Posted by gmc1990rodder

i have a '72 400ci sbc with everything as is from factory....what grade or weight of oil should i be using in this? btw i live in north central FL as far as climate goes..and this is a daily driver an opinion appreciated

I wouldn't use less than 10w-30 or more than 15w-40 depending on the season. 10w-40 is a good compromise, IMO.

[gmc1990rodder]

thanks cobalt, i would rather stick with one wieght for all seasons so will the 10-40 or 10-30 be better for all around use ?

[sqzbox]

gotta few miles on it go with 10-40. I think that what was recommended back in 72.

[gmc1990rodder]

actually its a donor motor from a '72 motor home that was parked since 1980 lol the odometer was also correct and it had 12500 miles on it lol....all i have done is changed all seals and gaskets,new set of valve guide seals, a high rise bowtie intake and edel carb.. and it purr'd like a kitty...gotta love the good back yard finds lol thanks for the help i'll go w/ 10-40

[gmc1990rodder]

OH AND BTW THE DONOR WAS FREE LOL.....ive only have about 6-700 miles on it so far

[sqzbox]

Dam fun when you get lucky like that. It don't happen to often. I got a 10K mile 350 for 400 bucks and the donor truck I used some parts from.

[gmc1990rodder]

that would be a welcomed find for me to... but around here everyone is selling the good stuff as scrape metal for pennies on the dollar!!! when ppl like us would love to have it and would probably pay a lil more than junk yard!!!