Mobil 1 oil weight

[Grant Lenahan]

Both 10w30 and 15w40/50 are too thick. run either 5W-30 or 0W40.

If your oil stays below 100 degC, all of those oils are TOO THICK, if 
you do a flow test.
Unless you are truly racing, it is a fallacy that you need thicker oil. 
  What you should really concentrate on is somethign that will give good 
lubrication at 20,30,40 deg C.

If you want lots of data to support this, do a search for "motor oil 
101" by AEHAAS, who's done extensive research on the subject.

0W40 is approved by Audi (VW50x.x approvals) for all temperatures we 
encounter in the USA/Canada/mexico at least.

I used 5W30 in my biturbo S4 (far more demanding than most motors) with 
great results.
I subsequently saw the specs on 0W40 and "that's all she wrote".  Its 
quite impressive.

You should look for an oil with ACEA A3/B3 approval if you want the 
best hgih temp/high shear protection.

Another great oil choice is ELF Excellium Full Tech synthetic 5W40 or 
0W30.

Grant


On Apr 29, 2007, at 11:58 AM, Ameer Antar wrote:

> I'm about to do an oil change and was wondering what's the consensus 
> on running
> full synthetic 10W30 during the early summer. That's what I ran during 
> the
> winter, but not sure if I should change that up now. I live in CT, so 
> temps
> will definitely be in the 80's when I need another oil change. I know 
> the
> manual calls for 15w40, but I'm not sure if that applies to full 
> synthetic.
> There is a 15w40 available in the extended performance oil, but it's 
> more
> expensive and very hard to find around here. So far, no ticking noise 
> from the
> lifters, but everything is fairly new. Am I going to do any damage 
> running
> 10w30? What about 0w-40? TIA.
>
> -Ameer _______________________________________________
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