What is normal oil consumption for L36? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-29-2005, 07:27 PM   #1
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Default What is normal oil consumption for L36?

I have 154,000 on my '96 SSE L36 and it is burning 1 quart every 2,000 miles. There is no visible smoke at start up so I would guess valve guides are ok. No leaks anywhere. I have not done a compression test to check condition of the rings. Car runs great and cranked out 29.5 MPG on the last 1700 mile road trip.

My 2 previous cars were both '92 series I EGRless. One was an SSE and the other was an olds 88 and both of these seemed very tight and only used 1 pint every 3,000 and I ran the 88 to 240,000 with no increase in consumption.

I use Castrol GTX 10W-30, NAPA gold filters and I do my own oil changes at 3,000 miles.

What are your experiences with series II oil consumption?
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Old 12-29-2005, 07:38 PM   #2
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0 '99 Grand Prix GT 80,000 miles
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Old 12-29-2005, 09:16 PM   #3
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It is not unusual for me to add a quart between oil changes (3500-4000 mile intervals) Using castrol 10W30
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Old 12-29-2005, 09:38 PM   #4
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127K. Essentially zero between changes. Maybe one mark or so on the dipstick.
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Old 12-29-2005, 09:41 PM   #5
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Quote:
Originally Posted by markwb
It is not unusual for me to add a quart between oil changes (3500-4000 mile intervals) Using castrol 10W30
same here
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Old 12-30-2005, 02:17 AM   #6
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i was burning next to none on mine with 157.xxx miles.

now i seem to go through about a quart every 2-3 thousand, but im told its normal so im not too worried about it.
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Old 12-30-2005, 08:29 AM   #7
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If I can't change oil at 3000 miles, I have to add a quart. But then again, I need to replace my oil pan gasket.
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Old 12-30-2005, 11:23 AM   #8
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Mine seems to lose no visible amount oil between oil changes. I know it leaks a little It leaks were trany meet the engine will actual seeps. When ever go underneath their always seem to be damp
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Old 12-30-2005, 11:59 AM   #9
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I usually don't add between oil changes every 3k and I'm down 1/2 qt or so.
I think thats nomal. Some engines use non between changes like my moms 88 Park Ave.
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Old 12-30-2005, 12:21 PM   #10
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Everyone keep in mind that the engine technology between the series 1 and series 2 is diffrent...

The series II engines will be more proned to using a bit of oil than others...

GM considers it normal to consume as much as 1 qt per 2000 miles( I don't agree with this But thats what they say )...

My 1995 L36 3800 II was using roughly 3/4-1 qt in 3000 miles for most of its life.... At the end of July I ended up doing the lower intake gaskets and upper intake...

The new intake came with all new gaskets and a new PCV valve... Its strange now I can hear the valve function, and my oil consumption has dropped to almost nothing... I was down 1 notch from full at 4000 miles... Getting close to 145,000 miles I think... And still using almost nothing for oil...

My LN3( 1991 LE ) has been a pretty good car overall... I have gone as long as 10-12 months on Mobil 1, and when I went to change the oil it was still full.. My friends Buick Park Ave is the same way... Uses nothing for oil... Most of the Vin C, L and 1 series I 3800'* pretty much never use oil... There are a few that do, but its rare...

From what we have gathered here, especially when it comes to a 3800 II , some seem to use oil and there are a few that use nothing...

I'd say if you use less than a quart in 3000 miles than you are doing ok

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