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Reformulated Mobil 1 15/50


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Hello All,

I am getting ready to change the oil in my car. I made the switch a while ago to redline oils as I heard that the extended performance mobil 1 15/50 was not up to par.

Now Mobil 1 has reformulated their 15/50 and it is no longer the exntended performance. Has anyone used this reformulated Mobil 1 15/50? If so, do you think it is up tp par?

Thanks!

Jason

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I used to use it(in the old formulation), but after a conversation with an respected racing engine builder at Mosport a month ago (who had 2 camshaft failures using this oil reciently) I decided to go to Valvoline Syn Power 20W-50 oil which apparently gives no problems in engines that dont have rollerised cam followers. :respect:

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I'm sticking with redline, from everything I've read it's still superior to the new Mobil formula.

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Castrol 10/60 fully synth does the trick for me..

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Does not sound good for the mobil 1 15/50. ALmost sounds like no one uses it anymore. Anyone else using the valvoline 20/50? Sounds like that may be the next choice.

Thanks for the help.

Jason

Edited by jfitz981
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  • 2 weeks later...
Does not sound good for the mobil 1 15/50. ALmost sounds like no one uses it anymore. Anyone else using the valvoline 20/50? Sounds like that may be the next choice.

Thanks for the help.

Jason

I still use the Mobile 1 15/50 as recommended by my mechanic a year and a half ago. I will add it to the list of questions i have for him next time i see him and let you know if anything has changed. just to get another opinion.

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i have been using valvoline vr1 racing 20/50 for the last 2 years with no problems, also, if you give the car regular oil changes (my oil n' filter is done every 1500 miles approx) as i do, the cost of the oil works out to about half the cost of the overated mobil 1, and valvoline comes in the full 5 ltrs cans. <_<

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I use Castrol Full Synthetic. I am howerver toying with the idea of changing to a lighter grade than 20/50 after reading the information (I posted it) regarding oils. Never had any issues with Castrol street driving... or at the race track in the MX-5, so I'll prob. keep using it.

Cameron

"If you feel that you are in total control of the car, well, your just not driving fast enough". Jimmy Clark

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Official Lotus quote from Brian Angus is as follows:

Lotus recommend the following oils:

Castrol Edge 10/60 Synth: Preferred oil

Mobil 1 15/50: If not above

Valvoline 20/50: Also if not above

Brians personal opinion was that (hope I remembered this right Brian) the 50's were fine, especially in winter when it's cold so the oil sticks just as well. However he would highly recommend 10/60 Castrol Edge when hot.

As such i have put Mobil 1 15/50 in mine now and will change it before summer to 10/60.

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