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-   -   Quick Question - What oil weight stock 1981 454 (https://67-72chevytrucks.com/vboard/showthread.php?t=406171)

my69camaro1 06-05-2010 01:08 PM
Quick Question - What oil weight stock 1981 454
 
Bought a bone stock 81 gmc with a 454 a month ago and I'm not sure what weight oil i should put in it.

Matt Man 06-05-2010 01:14 PM
Re: Quick Question - What oil weight stock 1981 454
 
mine says 10-30 but mine is a replacement motor from ac delco i would imagine that is it the same.

my69camaro1 06-05-2010 01:23 PM
Re: Quick Question - What oil weight stock 1981 454
 
K thanks.. I used wiki and it was saying 15w40 and that seemed off.

GmtGmt 06-05-2010 01:46 PM
Re: Quick Question - What oil weight stock 1981 454
 
all older cars and trucks i give them a good 10W-40 from Mobile or Valvoline

78 Chevyrado 06-05-2010 02:52 PM
Re: Quick Question - What oil weight stock 1981 454
 
i use 10w40. the reason some people say to use the 15w40 is its a diesel oil and it still has (or had) some of the additives gasoline engine oil is missing. (govt Removed what we need) I don't know if diesel oil still has the zddp or whatever in it still. it helps flat tappet camshafts not wear as much.

country29 06-05-2010 05:18 PM
Re: Quick Question - What oil weight stock 1981 454
 
Quote:
Originally Posted by 78 Chevyrado (Post 4015717)
i use 10w40. the reason some people say to use the 15w40 is its a diesel oil and it still has (or had) some of the additives gasoline engine oil is missing. (govt Removed what we need) I don't know if diesel oil still has the zddp or whatever in it still. it helps flat tappet camshafts not wear as much.
you are correct, it still has the zddp, here in eastern AR I run 15w-40 rotella T until it gets cold, then run napa 10w30. Also for those that dont know, napa oil comes out of the same plant valvoline does, ashland petroleum in ashland ky, if you want to save a few bucks next oil change. just my .02


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