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2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

View Poll Results: How often do you change your oil?
Every 3000 miles or 3 months. 29 61.70%
Follow the Oil Life Indicator on my car. 18 38.30%
Don't really keep track of when the oil is changed. 0 0%
You have the change the oil in these things?!?!?!?!? 0 0%
Voters: 47. You may not vote on this poll

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Old 06-24-2004, 11:09 AM   #31
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Default Re: Oil Life

Originally Posted by BPella
I use Castrol Syntec Blend 5W-40 or 20W-50.
BPella, why do you use the heavier weight oils as opposed to 5W-30 or 10W-30 that is recommended for the 3800 engines. Please don't take this as criticism because you get over 150K out of you engines using your methods.
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Old 06-24-2004, 03:45 PM   #32
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I can't answer for him.. but can speculate that its due to older engine tend to obviously have more wear, thus a heavier oil (thicker) would help seal the gaps from all the wear from years better and tend to cling on longer then thinner oil.

To my knowledge the # before W means the "weight".. which determines how thick the oil is in normal temp or cold.. and the last # 30 or 40 determines something along the line of viscocity and thickness at high temp ( or normal operating temp that the standard has set forth )
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Old 06-24-2004, 03:52 PM   #33
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I change my every 2000 miles. I usually use 10w30 napa oil and a carquest filter.

plus another good thing about having your car up on a lift that often is you will most likely notice leaks or problems that much earlier.

So yep....thats LOF every 2000 miles
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Old 06-24-2004, 08:48 PM   #34
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Default Why heavy Weight?

Drifter was partially correct, the heaver weight oil tends to leak less. But the main reason for the heavy oil is I live in Eastern Georgia. With temps in the 95+ all summer and me driving home in the highest heat and heavy traffic, I decided to run the higher viscosity oil. I have never added a oil cooler to any vehicle to help with the cooling so I just made this a habit. If I were up north, I would run a 10W-30 or 10W-40 since the temps are not as extreme.
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