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Sent a sample of my oil to Blackstone Laboratories for analysis. My oil had 7315 miles on it and the car was telling me it was time for an oil change. 2014 Chevrolet Cruze LT turbo with 39 258 miles. Car has always run on Mobil 1 full synthetic oil and OEM oil filters. I always change the oil when the oil life monitor tells me to. For anyone who thinks the oil change intervals are too long, this report should convince you.
 

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Cool! I use Mobil 1 in the summer and Royal Purple in winter and run both until 10,000 and even sometimes 14,000 and my engine at 130,000 miles with my foot in it every single mile is in pristine condition. Blackstone says my Mobil 1 holds up better than my royal purple by a tad but both still had 2-3k miles left in them for the most part.
 

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I guess I can see having oil checked by black stone. I personally would prefer to not spend money on a report and shorten the duration of the oil and just change it more often. Using a good quality oil makes sense for sure. I never been one to run for extended oil change intervals. Just personal preference.
 
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I guess I can see having oil checked by black stone. I personally would prefer to not spend money on a report and shorten the duration of the oil and just change it more often. Using a good quality oil makes sense for sure. I never been one to run for extended oil change intervals. Just personal preference.
You should see what euro cars say in their manuals. They're all "extended" oil change intervals @ min 8000 miles and recommended 11000 miles on my dads Mercedes
 

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You should see what euro cars say in their manuals. They're all "extended" oil change intervals @ min 8000 miles and recommended 11000 miles on my dads Mercedes
I am fully aware of extended oil change intervals, in the case does it make sense to buy a 50k dollar car and save a $100 a year maybe on extending oil changes? Everyone has an opinion on this matter, even though my CTD is a 27k car, about 6000 miles is enough for me, it is so inexpensive service it just makes sense to me and I drive about 20k miles a year. I am confident those that want to extend are probably safe and that's cool as well. The peace of mind that I know I am taking cRe of my car it's worth it to me. Plus I read on here occasionally about a warranty claim being denied because of lack of oil changes in a timely manner.
 
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I am fully aware of extended oil change intervals, in the case does it make sense to buy a 50k dollar car and save a $100 a year maybe on extending oil changes? Everyone has an opinion on this matter, even though my CTD is a 27k car, about 6000 miles is enough for me, it is so inexpensive service it just makes sense to me and I drive about 20k miles a year. I am confident those that want to extend are probably safe and that's cool as well. The peace of mind that I know I am taking cRe of my car it's worth it to me. Plus I read on here occasionally about a warranty claim being denied because of lack of oil changes in a timely manner.
I totally understand where you're coming from I was just stating that the Europeans use the best oil and change at 10000 miles with no problems. I do the same and I'd gladly show you my engine which is next to new with 130,000 hard miles on it with my pedal to the floor every single day :)
 

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I am fully aware of extended oil change intervals, in the case does it make sense to buy a 50k dollar car and save a $100 a year maybe on extending oil changes? Everyone has an opinion on this matter, even though my CTD is a 27k car, about 6000 miles is enough for me, it is so inexpensive service it just makes sense to me and I drive about 20k miles a year. I am confident those that want to extend are probably safe and that's cool as well. The peace of mind that I know I am taking cRe of my car it's worth it to me. Plus I read on here occasionally about a warranty claim being denied because of lack of oil changes in a timely manner.
I feel the same way, I change my oil around 6000 miles with full synthetic(Mobil 1) or every 4 months. The old 3000 mile/3 month oil change interval would be 4 times a year minimum we changed oil, so at 6000 miles still gives me around 4 changes per year at my 25K miles driven a year.

Not everyone drives 80% highway or 6000 miles very 2-3 months. No way I would do 6000 mile oil changes if I drove a more typical driving route, I would only change my oil once a year at that rate. The owners manual says to follow the OLM or change once a year, however I think a bare minimum I would do is 3 changes a year. I change my oil November, so i have fresh oil for cold starts in the winter, March to get rid of my winter idling probably fuel contaminated oil & July so I have fresh oil for the hottest part of the summer.
 

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Great news. I've always used Moble 1 for 30 years never a problem. Dad has used it for maybe 15 years before I ever owned a car. I always hear that brand is crap or not as good as this that or it used to be. You can pay more. You can pay less. I'm happy with what I use. I guess just use what makes you happy
 

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Ha, always ask for a partial refund when returning my used motor oil, only cost them practically next to nothing to refine it compared to making new stuff. Of course get the same answer, hail no! But still doesn't hurt to ask.

Changed my oil at 20% remaining being paranoid about warranty repairs, was kind of paranoid for nothing. 30's to early 60's cars needed a major engine overhaul before 50K miles, this sure changed with my 65 Buick, put over 330,000 miles it and still running great with conventional oil. But dumped studded tires for road salt, so that killed that car. And every car since then.

Seems like with new oils, we are wasting them, but instead of returning them for recycling, maybe we should be spilling all this oil over are cars for better rust protection.
 

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Sounds like a great idea. I keep threating to dump a quart at a time in my diesel truck to burn it up. I've spilled Moble 1 on hot exhaust manafolds and it flames up better than any fuel I've ever lit.
 
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