Oil Change interval? - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 05-17-2010, 12:16 PM
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Houbie Houbie is offline
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2002 Chevy TrailBlazer LS
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Question Oil Change interval?

I changed oil in my '02 Trail Blazer and changed to Mobil 1. The lube shop in Murrieta CA put a 7,500 mile sticker in the window. Is Mobil 1 good for that many miles? I put Penzoil synthetic in the wife's LaCross this past weekend and the lube guy says 5,000 miles on the Penzoil. I have a little over 5,000 miles on the Mobil 1 and the 4.2 hasn't used a drop.


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  #2  
Old 05-17-2010, 12:30 PM
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mubai mubai is offline
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Go by the DIC. It will tell you how much life you have left. 7500 seems like a good number. Some don't change until 10,000.
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  #3  
Old 05-17-2010, 01:25 PM
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Changed mine this weekend at 12,000+ miles after finally getting the change oil light. Had Mobil 1 synthetic extended life (15,000miles). Replaced it regular Mobil 1 synthetic and will stick to the oil life monitor.

Haven't heard of any engine issues or bad oil analysis from someone following the OLM.
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Old 05-17-2010, 02:46 PM
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Houbie Houbie is offline
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Talking Gulf Oil reclimation?

I'll go the 7,500 and see how it goes. Maybe BP can reclaim enough oil out of the Gulf to give us a few free oil changes.

Thanks for the info,

Houbie
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  #5  
Old 05-17-2010, 02:50 PM
Doc Brown Doc Brown is offline
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7500 on synthetic? I get that out of dino oil. I'm thinking you aren't going to get the full life and benefits of synthetic by changing it that soon.
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  #6  
Old 05-17-2010, 06:42 PM
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We go about 7500 on Mobil-1 and will go longer as I continue to use synthetic oils. I just switched from Dino 5K miles ago. TB has 135K on it.
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Old 05-17-2010, 07:03 PM
DJones DJones is offline
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I say go until the "Change Eng Oil" light turns on. And for the record, I have the DIC and it says I have 85% left and I've gone over 2,000 miles (I do plenty of highway). I use Mobil-1.
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Old 05-17-2010, 07:08 PM
OldSVTGuy OldSVTGuy is offline
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I wouldn't trust that "change oil light" for anything. First time it came on was 11,000, then 23,000 then something like 40,000 then 70,000, then 100,000. No way oil change intervals should be this long under any circumstances. I've changed it every 3,000 miles religiously and it starts looking fairly dark by then. Cheap insurance, very cheap insurance.

Anyway, that's my .02.
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Old 05-17-2010, 08:23 PM
lbls1 lbls1 is offline
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Hate to be a dissenter, but driving the car past the service interval until the "change oil light" appears should never happen. The longest interval you should leave oil in the crankcase should be the recommended service mileage in the owner's manual. If you guys and ladies are adding oil between extended change intervals or are waiting for a "change oil light" then you could be doing more damage to the engine than necessary.

I've changed oil at 3,000 miles on the mark (as a preference), and I have avoided engine breakdown, excessive engine wear and oil usage issues on my past cars. I have also seen cases where premature engine wear and breakdown have occurred from infrequent oil maintenance. I've changed oil at 1100 miles on some cars (stored) so as to help keep engine wear down by maintaining clean oil in the crankcase. A lot of people go farther than 3,000 miles, so I would say that one should keep an eye on the cleanliness of the oil and change it at the recommended service interval.
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  #10  
Old 05-18-2010, 01:10 AM
WOOLUF1952 WOOLUF1952 is offline
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Quote:
Originally Posted by lbls1 View Post
Hate to be a dissenter, but driving the car past the service interval until the "change oil light" appears should never happen. The longest interval you should leave oil in the crankcase should be the recommended service mileage in the owner's manual. If you guys and ladies are adding oil between extended change intervals or are waiting for a "change oil light" then you could be doing more damage to the engine than necessary.

I've changed oil at 3,000 miles on the mark (as a preference), and I have avoided engine breakdown, excessive engine wear and oil usage issues on my past cars. I have also seen cases where premature engine wear and breakdown have occurred from infrequent oil maintenance. I've changed oil at 1100 miles on some cars (stored) so as to help keep engine wear down by maintaining clean oil in the crankcase. A lot of people go farther than 3,000 miles, so I would say that one should keep an eye on the cleanliness of the oil and change it at the recommended service interval.

This is what the Owners manual recomends: Change engine oil and filter as indicated by the GM Oil Life System or every 12 months, whichever

occurs first
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