Marvel Mystery Oil

[evillecutter]

a teaspoon's worth of "taste testing" ought to answer that question...

accidentally used tablespoons instead of teaspoons - did NOT remove the coffee stains from my teeth

[VxSport]

I tried this stuff, told about it from my fav mechanic. I only tried it for a short time before switching to a Lucas product. I didn't see any improvement on the oil consumtion problem. I like most of us, check the oil on a very reg basis. Yesterday added 1/4 quart addjustment. On average I use a quart per 750 miles, and have for the past 5 years / 70K. We have a original engine with 144k on it. I have been VERY lucky.

[blacksambo]

I'd check your oil filler cap seal. Then your PCV valve condition, first.If those items check out give Marvel a try before your next oil change.

[kehecross]

I'd check your oil filler cap seal. Then your PCV valve condition, first.If those items check out give Marvel a try before your next oil change.

Been there, Done that! Its all good or new.

[Jolly Roger VX'er]

found this interesting thread (specific posts are #3 & #6):

http://forums.tdiclub.com/showthread.php?t=357873

[kehecross]

Just dumped a 1/2 quart in today. Hope it works! From the sound of the other forum he had luck with MMO loosening the rings on his motor. I figure it is worth a shot, It is not any good the way it is. I have talked to a lot of people who swear by the stuff. The only thing I am not sure of is using Shell Rotella 5W-40 synthetic. I know I have read on here where some have been using it since VX was new. But I don't think I want too use it, I think I will stay with Castrol for now and see if consumption improves with MMO.

[evillecutter]

i dropped a quart in we'll see what happens - says to use every oil change and leave in not like seafoam where you put in a few hundred miles before changing oil but im going to change it after a few hundred anyways

[blacksambo]

Synthetic I wouldn't worry about. Not using I would be concerned about as it is so far superior to standard oil. Marvel Mystery might or might not clear the sludge from the piston oil drain holes which tend to clog with the 6ve1. It's worth a shot. Our engines don't burn oil as much as pump it out through the PCV system due to internal pressure or vacuum (more correctly).

[Ldub]

Our engines don't burn oil as much as pump it out through the PCV system due to internal pressure or vacuum (more correctly).

Couldn't agree more...

[kehecross]

If oil consumtion is also being caused by pcv, Then why does it take 50,000 miles for it to show up? I would say it might be a small part of the problem. Or are you saying that because the oil holes are plugged this causes the internal pressures to force the oil out?

[89Vette]

If oil consumtion is also being caused by pcv, Then why does it take 50,000 miles for it to show up? I would say it might be a small part of the problem. Or are you saying that because the oil holes are plugged this causes the internal pressures to force the oil out?

PCV's are basically installed and built-in to compensate for increasing "blow-by" as engine's age. The older they get, the more blow-by...and need for pressure equalization.

IMO, the question is whether issues with ring design is causing pre-mature blow-by....and "engagement" of the PCV function.

[VX KAT]

PCV's are basically installed and built-in to compensate for increasing "blow-by" as engine's age. The older they get, the more blow-by...and need for pressure equalization.

IMO, the question is whether issues with ring design is causing pre-mature blow-by....and "engagement" of the PCV function.

wow, that's interesting, I didn't know how the pcv worked.
What would happen if the pcv valve got stuck closed?

[tom4bren]

Excessive head pressure isn't just an Isuzu thang. I had 2 MOPAR engines in the past that required constant maintenance of oil breather & PCV. They would crud up worse than a North Dakota nostril in February.

[kehecross]

PCV's are basically installed and built-in to compensate for increasing "blow-by" as engine's age. The older they get, the more blow-by...and need for pressure equalization.

IMO, the question is whether issues with ring design is causing pre-mature blow-by....and "engagement" of the PCV function.

Question answered!!! If the oil rings are getting gunked up and are sticking inside the groove that would aid in the added blow by (although they are just a scrapper and as far as I know they do not add that much to compression.) So as I said in previous post I did change out the PCV and had no change in oil consumtion. The PCV can only do so much. So one must get these rings and holes cleaned up someway short of a complete rebuild.

[blacksambo]

It takes time to plug up those pesky piston oil drain holes with sludge.