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Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06

Posted By: Emperors6

Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 01/11/20 02:55 AM

All mileage is in kilometers not miles.

Notes from oil slip: "25 hours of track time + street. Had a few cold starts at 5F. Was the oil too thick? Did it cause any problems? I've switched to Mobil 1 5W-30 for winter." The OLM was at about 30%

Previous fill was Mobil 1 15W50.

[Linked Image from imgur.com]
Posted By: demarpaint

Re: Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 01/11/20 10:44 AM

@ 5F I would have thought a 15W50 would have been a possible problem, it appears not. That's a nice dose of ZDDP in that oil. I wonder if a 5W50 would have made a difference, or if it would have sheared? I'd be interested in seeing how the 5W30 does. I might have been tempted to use a 5W40 for the winter, or Mobil 1 ESP 0W40. Thanks for posting.
Posted By: joekingcorvette

Re: Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 01/11/20 12:47 PM

Nice report. Those C7 Z-06's are awesome. I would use the 5W30 or a 0W30 in the wintertime if you are not doing any racing. Nice to see you are not scared to drive the car due to the miles you are putting on it.
Posted By: aquariuscsm

Re: Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 01/11/20 03:50 PM

That's an excellent uoa! M1 15W50 has always been one of my favorite oils.
Posted By: Cujet

Re: Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 01/11/20 04:28 PM

M1 15W-50 remains one of my favorite oils for very high performance engines. Always good results.
Posted By: SR5

Re: Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 02/01/20 12:48 AM

Yes M1 15W50 is a great performance oil, shear stable, solid zinc at ~1100 ppm, and after 6k miles a decent retained TBN of 4.7 with a modern (LSPI friendly) Ca & Mg detergent package. Plus it carries the Euro A3/B3 spec.
Posted By: Geoff

Re: Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 02/07/20 02:54 AM

Well I was a little concerned in colder weather but this is a good report. Changing my oil to Mobil1 15w-50 per the manual for track use in a couple weeks. Looks like I can leave it in.
Posted By: Emperors6

Re: Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 02/07/20 10:34 AM

What's your definition of colder weather?
Posted By: ssregal39

Re: Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 02/19/20 02:16 PM

thanks for the report. I've been using mobil 15-50 in flat tappet oval dirt cars and never had an issue.
Posted By: ad244

Re: Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 02/19/20 04:20 PM

Wow, love that flashpoint. Interesting aluminum trend but probably noting to worry about
Posted By: rrounds

Re: Mobil 1 15W50, 6k mi OCI, 21.6k mi, C7 Corvette Z06 - 02/20/20 07:49 PM

The only way a 15w-xx oil would be a problem at 5F is if as soon as it fired up you took it to red line. Good looking UOA.

Rod
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