Quick Question - What oil weight stock 1981 454 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

my69camaro1 · 06-05-2010, 01:08 PM

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

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

K thanks.. I used wiki and it was saying 15w40 and that seemed off.

GmtGmt · 06-05-2010, 01:46 PM

all older cars and trucks i give them a good 10W-40 from Mobile or Valvoline

*78 Chevyrado* · 06-05-2010, 02:52 PM

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

Quote:

Originally Posted by 78 Chevyrado

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

06-05-2010, 01:08 PM	#1
my69camaro1 Young One Join Date: Oct 2003 Location: La Porte Indiana Posts: 138	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. __________________ 69 R/S Camaro 79 K5 86 M1008 11 P71 Vic 12 Ram 3500 18 Ram 2500

06-05-2010, 01:14 PM	#2
Matt Man Registered User Join Date: Oct 2009 Location: Buhl, Idaho Posts: 1,438	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. __________________ 86 c30 crew cab dually 454/400 4/6 drop SOLD 1-8-11 1981 chevy K10 short Bed Scottsdale SOLD 10-26-2020 67 GMC Stepside Straight six/3 on the tree "The Peach" 2020 Silverado Double Cab LT Z71 5.3 8 speed Daily Driver K10 build http://67-72chevytrucks.com/vboard/s...d.php?t=671934 The Peach build http://67-72chevytrucks.com/vboard/s...d.php?t=733903

06-05-2010, 01:23 PM	#3
my69camaro1 Young One Join Date: Oct 2003 Location: La Porte Indiana Posts: 138	Re: Quick Question - What oil weight stock 1981 454 K thanks.. I used wiki and it was saying 15w40 and that seemed off. __________________ 69 R/S Camaro 79 K5 86 M1008 11 P71 Vic 12 Ram 3500 18 Ram 2500

06-05-2010, 02:52 PM	#5
78 Chevyrado Account Suspended Join Date: Dec 2007 Location: Unnapreciative, Trollville Posts: 2,079	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.

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