Sorry
I strip alot of engines gas, propane and CNG. The gas engines show lots of
varnish and sluge. The propane engine is always as clean as the day it went
togther bright and shinny inside and I could convince you its was just like
new. I have stripped synthetic oiled engines that had a high oil line and
the varnish was thick above the oil line. I think that there is great
advantage to frecquent oil changes with muligrade oils they contain
detergents 2k is alot for me. I think the time spent under your van is
always well spent
Oil changes early and often this is just as important for engines that are
just started and run a short time then shut off.
Gas acuumulation and cylinder washing does more damage to cylinders than
normal running. VW orignal oil change intervals
was 1500 miles
And yes oils have changed alot in 50 years

Bob Donalds
Boston Engine

----- Original Message -----
From: "Dennis Haynes" <d23haynes57@HOTMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, October 03, 2007 2:21 PM
Subject: Re: Thoughts on running Mobil-1 Synthetic oil

> Sure they do! Most of the dirt in oil is the result of the oil itself
> breaking down. If the oil does't break down, no dirt to clog or fill the
> filter. The Vanagon filter is fairly large for the engine size. Should be
> no
> need to change it more frequently than the oil. Factory recommendation is
> 7,500 miles for both conventional or synthetic for both the oil and
> filter.
> So that should be no problem for a modern oil especially a synthetic. So
> far
> that interval has worked for FUN BUS for 251,000 miles. Recent oil
> sampling
> has also supported those intervals. Reason for last change recommendation
> was excessive nitration. Oil was still clean and within viscosity specs
> but
> high temperatures where causing the Mobil to breakdown. The Fox on the
> other
> hand makes it to about 14,000 miles and recommendation comes out as
> excessive wear particles.
>
> If you really want to know how often to change your oil, oil analysis is
> the
> only way to go.
>
> Dennis
>
>
>>From: Nunya Business <bulletheadx@GMAIL.COM>
>>Reply-To: Nunya Business <bulletheadx@GMAIL.COM>
>>To: vanagon@GERRY.VANAGON.COM
>>Subject: Re: Thoughts on running Mobil-1 Synthetic oil
>>Date: Wed, 3 Oct 2007 12:26:08 -0700
>>
>>That seems to be a pretty common practice with synthetic oil- the oil
>>might
>>last twice as long as the 'regular/dino' oil but the filters don't last
>>any
>>longer than they did.
>>
>>Cya,
>>Robert
>>
>>
>>On 10/3/07, mike <mwmiller@cwnet.com> wrote:
>> >
>> > You really change the filter twice as often as the oil?
>> >
>> > Mike
>> >
>> >
>> > On 10/3/07 10:51 AM, "David Clarkson" <dvdclarksn@AOL.COM> wrote:
>> >
>> > > I have run Mobil 1 15w-50 since my van had 105k on the odometer. I
>> > rebuilt the
>> > > engine at 168k (not sure of the oil used prior to my purchasing the
>> > vehicle or
>> > > how it was maintained/driven) and change the oil ever 6k and the
>>filter
>> > every
>> > > 3k. I now have 244k on my van and use it as a daily driver. I have
>> > absolutely
>> > > no oil leaks and almost no oil consumption. My oil pressure buzzer
>> > > has
>> > never
>> > > sounded and I have no reason to believe that I have any oil pressure
>> > issues. I
>> > > don't know of anyone that uses Mobil ! that has been able to
>> > > attribute
>> > oil
>> > > pressure problems to this synthetic oil. It is well worth the extra
>> > money in
>> > > my opinion.
>> > >
>> > > David Clarkson
>> > > 90 Westy (244k)
>> > >
>> > >
>> > >
>> > >
>> > >
>> >