I'm with Chip. I do annual changes (12-15k) on all vehicles and all run
synthetic lubes, in the manufacturers suggested viscosity. I've done this
since 1981 and most vehicles have gone close to, or over 200k miles with no
engine issues. They usually get totaled out before I can wear them out.
My Triumphs are, as of the last oil change, running Delo Diesel (old
formulation, not the new Delo lite) due to zinc concerns in these flat
tappet engines only, but I will get them back onto synthetic soon, probably
Redline oils, as they have all the zinc, etc., that these engines need.
Jack
-----Original Message-----
From: shop-talk-bounces@autox.team.net
[mailto:shop-talk-bounces@autox.team.net] On Behalf Of Chip Mautz
Sent: Wednesday, October 22, 2008 10:03 AM
To: Mark Andy
Cc: shop-talk@autox.team.net
Subject: Re: [Shop-talk] Oil grade selection
I'm a renegade, I guess - or maybe a maverick? :-) I don't subscribe to the
change early and often mantra, I go usually 10-15k/oil change in my
vehicles.
I've done this with:
a 2002 Pontiac Grand Prix GTP (supercharged), no problems a 2007 Jeep
Wrangler - 30k miles so far, no problems a 1999 BMW 323i - 142k miles, no
problems a 1988 BMW 528e - 250k miles, no problems a 2001 Dodge Ram 1500 a
1996 Land Rover Discovery
and many other vehicles I've owned. Some dino, some synthetic (old mobil 1
formula).
On another note - be aware, there is a new mobil 1 formula, which may not
protect like the mobil 1 of old. Saw that on the net - maybe from some SCCA
racers.
Chip
On Wed, Oct 22, 2008 at 11:29 AM, Mark Andy <mark@sccaprepared.com> wrote:
> Howdy,
>
> On Wed, 22 Oct 2008, Bob Spidell wrote:
>
>> Ford recommends their 5W-20 semi-synthetic for my new Mustang--you
>> think 30W is thin!--and oil changes every 7,500 hundred miles regardless
of usage.
>> I gave it a lot of thought and, since I drive mostly city miles,
>> decided to go to a 5,000 mile interval. And, I stuck with the
>> 5W-20--against my instincts, at first--when I found I can get it for
>> $2/qt at WalMart. Yes, the manufacturers need better CAFE numbers,
>> but new engines are built with such tight clearances a quality
>> thinner oil will be fine. I believe Ford's engineers know what
>> they're doing--even if their accountants don't ;)
>>
>
> Everyone should make their own decision on this stuff, but you can get
> oil analysis done (what's the plural of analysis?) to tell you the
> condition of your oil. You can use that to determine if its ok to
> extend your change intervale.
>
> One place is blackstone: http://www.blackstone-labs.com/
>
> I've been happy with their service and the price is pretty reasonable
> to me.
>
> I routinely run >5k miles on conventional oil in our Chevy Venture and
> Toyota MR2 and >8k on synthetic in our Honda Civic. Oil analysis in
> each case at the end of a run made me feel fine with that.
>
> Mark
>
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