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What for Oil - 4,9 L


zuzzzi

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Hi, i saw in the Manual, that i dont fill 10W40 in the 1992 4,9 L Engine. I don´t know, you are remeber, i have change the Engine, and fill in 10W40. Now the Problem is, that the Lifters knock for a few secounds, when i start the engine.

So i think the Problem is the 10W40, or the Oil Filter (there is a K&N Oilfilter in the Engine).

What is the best Oil for this Engine?

And what is with Konocking Lifters?

Best Regards

Marco

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10w-30 is what its spec' says if memory serves me right.

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The guru recommends that we use the 15W40 version of the Rotella/Delvac/Delo in the 4.9 as a result of the wearing surfaces and the distributor gear...and the number one main bearing knock....

Read this thread over regarding the decrease in ZDDP in the ILSAC GF-4 oils available today. Those oils with reduced ZDDP are not too good for your 4.9 and my 96 NS with flat tappets....

I just used 10W40 in my 96 Deville on my last oil change due to it NOT having reduced ZDDP. I will NOT leave it in long and will do either 1) Use 10W30 and spike it with GM EOS or 2) use 15W40 or 10W30 version of the Rotella/Delvac/Delo...... I will not use the ILSAC GF-4 oils in ANY flat tappet NS...that is the reason I am looking for a NS with roller tappets (started in 2000?)... for my next car.....

Read the whole thread regarding the decrease in ZDDP, BUT read the last few pages of it for sure....

http://www.cadillacforums.com/forums/north...-cars-long.html

Furthermore, see this thread on oil, its pretty amazing:

http://www.cadillacforums.com/forums/north...api-grades.html

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I use 10-40 in my '92 4.9. cuts down a lot on the main bearing knock, plus....if you have some miles....the thicker hot viscocity (40 weight) will fill in those wear markes and larger gaps.

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use 15W40 or 10W30 version of the Rotella/Delvac/Delo...... I will not use the ILSAC GF-4 oils in ANY flat tappet NS...that is the reason I am looking for a NS with roller tappets (started in 2000?)... for my next car.....

I didn't know Rotella/Delvac/Delo was available in 10W-30. Interesting!

Yes, the model year 2000 was the debut for the "2nd generation" Northstar with roller tappets, among other changes.

Jason(2001 STS, White Diamond)

"When you turn your car on...does it return the favor?"

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Jason, if you check out those links, I think clarkz and chevelle state that is comes in 10W30..... I will be hunting down a few cases of it! Thanks for the info on the roller tappets....

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Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I will say, there is a barely perceptible improvement in smoothness between my '97 engine and my '01 engine. That could also be a difference in the vehicle also. The biggest difference I've seen so far is the slightly cheaper regular (87 octane) fuel; my '97 doesn't like regular fuel.

Jason(2001 STS, White Diamond)

"When you turn your car on...does it return the favor?"

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Given that you have the 300 HP version, I would think that you would feel the hopped up CAM that provides the 300 HP version with its added HP.... The guru used to say that at idle it had a lope..... I like that...

I just got back from WALMART and they had Rotella T 15W40 and straight 30W and Mobil Delvac 15W40 but no 10W30.....

I will keep looking...

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Given that you have the 300 HP version, I would think that you would feel the hopped up CAM that provides the 300 HP version with its added HP.... The guru used to say that at idle it had a lope..... I like that...

I think that was the earlier generation (before roller tappets). This one is pretty smooth, no matter the engine speed.

Jason(2001 STS, White Diamond)

"When you turn your car on...does it return the favor?"

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