what syn oil to use?

[duandcc_forums at cox.net]

I run goog old dino based 20W50 year round in my NG powered CGT. That plus a good oil filter and my lifters are pretty quiet (not perfect) until about 2,500-2,800 miles after the last oil change. Lifter tap, to me, is just a reminder to change the oil and filter. When I go her, she had a lifter that was totally stuck. I got it "unstuck" by removing a quart of oil and adding a quart or Marvelous Mystery Oil (MMO). Good stuff IMHO. It's highly detergent and cleaned up the liifter and passages and eventually (over the next 100 miles) completely unstuck the lifter. I know it really did what it claims to do, clean out the engine, because the engine was pretty gummed up when I got her, fresh oil would turn black within 250-300 miles. Now, it looks clean 2,500 miles later.

Now, about a week before and oil change I do this same thing to keep her clean. Drain out (or pump out in my case, using a drill mounted pump with the suction hose put down the dip stick hole) 1 quart of oil, add 1 quart of MMO and just drive normally. The a week or so later I change the oil and filter. I'm sure others on the list will say that all oil addatives are complete bunk, and some may even say dangerous, but I am a happy repeat customer of MMO and will continue to use it as part of my oil change process.

Dave
1987 CGT Special Build
SE Virginia

>
> From: "The Loves" <theloves at localaccess.com>
> Date: 2003/03/09 Sun PM 06:11:47 EST
> To: "InfernoCL" <infernocl at wi.rr.com>,
> 	"'Fred Munro'" <munrof at sympatico.ca>,
> 	"'Al S'" <zeus83858 at icehouse.net>,
> 	"'quattro-list'" <quattro at audifans.com>
> Subject: Re: what syn oil to use?
>
> Hmmm. 20-50 dino in the 4kq with 256k on it and no smoke and uses less than
> 1/2 qt per 3k.
> Then I get stooopid. I put Mobil 1 10-30 for older vehicles in my Urq (which
> was just fine before at about 100k) and then I get oil leaks coming from
> multiple places. Needless to say, now I'm back to 20-50 and all is fine.
>
> ----- Original Message -----
> From: "InfernoCL" <infernocl at wi.rr.com>
> To: "'Fred Munro'" <munrof at sympatico.ca>; "'Al S'" <zeus83858 at icehouse.net>;
> "'quattro-list'" <quattro at audifans.com>
> Sent: Sunday, March 09, 2003 11:35 AM
> Subject: RE: what syn oil to use?
>
>
> > 15w-50 is just a waste, them super heavy oils just rob power and decreases
> > protection. Any synth oil today should offer enough protection for any
> > engine including F1 engines. But its true old engines should stay away
> from
> > 0 weight, 10w-30 works fine though.
> >
> > Remember thick oils robs power, increase oil pressure and have more engine
> > wear......
> >
> > -----Original Message-----
> > From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com] On
> > Behalf Of Fred Munro
> > Sent: Sunday, March 09, 2003 10:53 AM
> > To: Al S; quattro-list
> > Subject: RE: what syn oil to use?
> >
> > The older engines are not designed for 0 weight oils. Use the oil weights
> > your owners manual recommends for both syn and dino oils. For your car, it
> > is probably 5W30 or 10W30 for winter and 10W30 or 15W50 for summer. I use
> > Mobil 1 10W30 year round in my '94 S4.
> >
> > HTH
> >
> > Fred Munro
> > '94 S4
> >
> >
> > -----Original Message-----
> > From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
> > Behalf Of Al S
> > Sent: March 8, 2003 5:42 PM
> > To: quattro-list
> > Subject: what syn oil to use?
> >
> >
> > I rebuilt my 1990 Audi 80 non-q 4 cyl engine. Now I want to use synthetic
> > oil in it, but I am not sure what grade to run. Castrol  treats it as a 12
> > yr old engine and recommends 30w with no syn listed. Mobil -1  doesn't
> know
> > either.
> > My temps here run from 10-100f and I am thinking of using 0-40. Anyone
> with
> > a suggestion??
> > Thanks.
> >
> > 1990 Audi 80 2.0L non-q
> > Rathdrum, Id.
> >
> >
> >
>
>