Can a Bonneville handle thicker oil? My pressure is still low. - Page 2 - 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 11-27-2008, 10:42 AM   #11
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This may be a stupid response, but... what if it'* simply a faulty reading from the oil sending unit? The guy at the shop obviously doesn't know what he'* talking about, maybe he didn't even think about the sending unit causing the guage'* reading to drop so low.
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Old 11-27-2008, 12:13 PM   #12
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Not everyone knows every little thing about these engines. The people here work on them every day, so we tend to know more of the little tricks.
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Old 11-28-2008, 11:06 AM   #13
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i have used 20/50 in some of my gm cars with week oil pumps and sloppy bearings, does not hurt anything, good luck!!!
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Old 01-01-2009, 06:24 PM   #14
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I have a 02 and the oil gauge reads 60 sometimes and I can drive for miles with no change. Other times it reads 40 and then drops at idle to 20. I'm suspecting the relief valve but haven't done anything yet. Wondering if anyone has any advice.
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Old 01-01-2009, 10:24 PM   #15
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Im Using 10w40 and Lucas Engine Oil Stabilizer , because my motor has crappy oil pressure (in the manual it states to use 10w30)

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Old 01-01-2009, 10:42 PM   #16
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Quote:
Originally Posted by Brando_is_DTF View Post
It'* definitely not the relief valve on the pump, but it might be the pump itself? I'm not sure.
I have only had the car for a few months, so i'm not sure what the previous owner used, but I got my oil changed twice since i've had it, both times with just the basic pennzoil. I almost did it myself but I don't have the time with school and helping my mom out. So i'm not sure if there are any metal flakes.

I always keep oil in the car, but it does leak oil. but not very much, and i always keep it at almost full.

The car is a '96 SE with about 126K miles on it.

There isn't any noise really, although it'* stalled once since the engine repair, but it started right up again. Also, the other day after I took my foot off the brake, the car moved forward pretty quick, the CHECK OIL light came on [I checked, it'* fine] and the ABS light came on. I figured it was something with the speed sensor maybe? I have a few problems with the front passenger suspension/wheel. Too many pot holes in Pittsburgh
Haa your in the same situation i was in when i first got my Bonneville last March, oil pressure crap, leaking coolant in the intake manifold, brakes squealing , etc. I ended up spending over $1700 on it , now im talking only parts NO labor since i did most the work myself. Finally got it running and purring right after i finished high school during July08. Forgot to mention i also had to do 3 oil changes as well since i knew the previous owner and he didnt do an oil change for a good 13,000kms . I used 1/2 liter of tranny oil on the first oil change to clean out at least a little of the crap that was in the motor and now im using Lucas and thicker oil , and shes running fine.


Read this before you get Lucas:
http://www.bobistheoilguy.com/images/lucas/lucas.htm

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