Quote:
Originally Posted by KaMaRow
Do you think people are just stuck doing what they always have? IM getting to be an old timer myself and I remember it was every 3000 miles then 4000 then it got to be 6000 and now most cars are 7500 miles. My civic i had was 10000 miles for oil changes. I think its hard to let go of what we have always done? I mean these companies invest millions to research and warranty the stuff I know they don't want to repair anything so why would their recommendations be wrong? Even so once my oil gets to 3k I start getting anxiety and the overwhelming need to go change it LOL. but hell with the ZL1 using 2.5 gallons of oil and the oil change pushing well over 100 bucks Im a little less inclined to change it so much.
do you feel the diff oil is necessary? or was just a personal preference?
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I think there's always been people who are more cautious and lets face it, we're all influenced by previous experience. It was tough for me to accept changing oil at 7500 miles in a V6 even though it held 6 quarts when I was accustomed to 3000. From what I've read, modern engines dont produce the same amount of wear in debris they did 40 years ago. On the other hand, 10 quarts of oil is a LOT of oil for an engine especially if it isnt being ran hard. The first oil change I did at 1500 miles looked like I was changing barely used oil. Still, I did it.
Like you, I read many posts, saw what the consensus was, and mostly followed it. After 500 miles and a filter change, I ran it harder than recommended. Not that I advise it, I'm simply an abusive driver. After 1500 miles, I started taking it to the drag strip. Most importantly though, I did at least what GM called for.
I absolutely believe changing the diff fluid is a good call! The accounts you read here document fairly heavy contamination after 1500 or so miles and that was my experience too. The second time I changed it, after maybe 5000 or 6000 miles AND a day at the track, it wasnt nearly as contaminated. Both times I used the GM Dif Fluid.
I've got the A10 and I changed the filter and fluid in it after a day at Putnam Park road course. I think it was around 6 quarts, but I cant remember for certain. Replaced with the correct GM ULV trans fluid.
Since I tend to drive it hard even on the street, I change the oil twice as often as required.