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So, what is the concensus on the new M1 5W-40 "SUV" oil ????

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Old 07-31-2004, 05:55 AM
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Default So, what is the concensus on the new M1 5W-40 "SUV" oil ????

I'm ready to change the oil, and was wondering if anyone has tried the 5W-40 yet....Or should I just stick with the 0W-40 M1 I have been using since the car was new??
Old 07-31-2004, 05:59 AM
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Marketing. Besides, are you driving an SUV?
Old 07-31-2004, 06:05 AM
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Default Just curious about the 5W-40 weight........

Since, I believe, the K04's have slightly bigger oil passages, if the 5W-40 wouldn't MAYBE be a better weight than the usual 0W-40. Just thinking "online".
Old 07-31-2004, 06:29 AM
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Default It sounds like Mobil Delvac 1 5W-40 with a new label.

This is Mobil's synthetic for diesel applications. <A HREF="http://www.mobil.com/Canada-English/Lubes/PDS/IOCAENCVLMOMobil_Delvac_1_5W-40.asp">Delvac 1</a> is a great oil; I've used it it my cars and racecar for many years (though I'm using M1 0w-40 now). For 18-wheelers using Delvac 1, Mobil's recommendation was oil changes at 100k miles and engine rebuilds at one million.

Still, I am thinking about changing oils, but to <A HREF="http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil_1_Racing_0W-30.asp">Mobil 1 Racing 0w-30</a>.
Old 07-31-2004, 09:10 AM
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2nd. I've used a 50-50 mix of Delvac 5W40 and Mobil 1 0W-40 on every Audi I've owned.
Old 07-31-2004, 09:31 AM
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Default Do you need heavy oil when your car is cold?

Because that is the only difference.
Old 07-31-2004, 10:20 AM
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Default 5w-40 is still a pretty thin oil when cold ...

At least on paper, the 5w-40 would contain less viscosity index improver than a 0w-40. Since a VI improver isn't really a lubricant, the 5w-40 contains a higher percentage of functional lubricant ... usually.
Old 07-31-2004, 12:07 PM
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Default better additive package, more anti wear stuff...I am using it.

HOT here in Texas...and I have 70,000 miles now. I will use Mobil 1 SUV or Delvac 1 (same stuff) from now on..
Too thick?? NO! We used to think 10W-30 was a Thin "Winter Oil". 5w cold rate is good enough unless you can Shoot Caribou in the back yard.
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