Y33 ('01 Q45T) Question on engine cleaning/Varnish removal

[q45roadwarrior]

Ok guys, don't yell if this has already been answered......I did a search and readthat some members use MMO (is this strictly for engine clicking or also for cleaning?) and others use MOA.

Please tell me exactly how these should be applied and how they help. I've done oil changes every 3-4k with Mobile One Syn.,but fro the posts I read from Texasoil (smart guy) , all cars build up varnish deposits.

Thanks in advance for any info you can give me.

[elwesso]

I would personally use a can of BG quick clean... That will go a long way...

Do it right before an oil change, get the engine HOT (drive for 10miles/minutes, NOT idle) and add it, one can.. Then idle or drive VERY gently for 10-15 minutes, then change oil.. Done deal!

[q45roadwarrior]

Wes,thanks for the info on BG cleaner-How often should I do this? and what does the MMO do that some guys have used?

Many thanks,NedQ45roadwarrior

[maxnix]

MMO is more gentle and needs to be used over time (several oil changes), which is preferred is you have substantial varnish deposits.

Also worth considering a crankcase flush like http://www.envirolution.com . Won't remove varnish tinge, but will flush larger deposits, especially grunge in the oil pan. I did this to all of mine before switching from conventional to synthetic.

[elwesso]

Honestly thats not a bad thing, but im not sure if id do it again..... Id like to do that sometime to this Q and see if it will remove some of my residual varnish..... I want it to be perfectly clean...

Id spend my money (100) on doing weekly oil changes with MMO or whatever...

[texasoil]

What is best depends on what is in the engine. Lost of sludge needs a MOA type package--lots of detergent, easy on the solvent. You need to redissolve the sludge--otherwise it can (will) sluff off and plug up oil return passages and oil screens. Not good for the engine. If its loaded up with varnish--you should go easy--multiple MMO treatments and high detergency again. A shock treatment with heavy varnish will cause it tocraze, crack, and flake off--plugging lots of fine orifices like HLA's etc. Not pretty. A light amber/yellow layer (less than a few sheets of paper thick) can be safely attacked with a solvent treatment in one shot.

[elwesso]

Keith

How do you feel about the engine oil flushes that Brian described? Effective or is the thing you gave good enough...

Like Dennis has said, it takes about 1/10 the time to clean up stuff as it does to deposit it...

[tkd_q45]

You might want to try Auto-rx. Did this in my 92 and it is freakishly clean under the oil cap.

http://www.auto-rx.com