Originally Posted By: KeMBro2012
I'm not gonna quote your whole post Clevy, but I will state that I agree with it wholeheartedly.
Each oil has its own add pack and each add pack will clean differently. Take my 2000 Corolla, for example:
Royal Purple - The fill for my first OCI with this car. I went with this because my 99 Corolla ran whisper quiet on it once I had it cleaned up. The 2000 didn't run as quiet on it, but it darkened up pretty quick due to the mess inside the engine. Due to the price, I decided to switch. Dark and opaque when changed at 3000.
Pennzoil Platinum - I ran this next because it seemed to do a [censored] of a job cleaning up the 99. Id seemed to do a [censored] of a job on the 2000, as well. It darkened within 200 miles and the engine quieted down a lot withing 500. Dark and opaque when changed at 2500.
Pennzoil Ultra - I tried this next, figuring that its stronger add pack would clean more than PP did. It didn't darken but maybe a shade or two in 2000 miles. It was black as a bottle of Coke and becoming opaque a few miles after adding 1/2qt of MMO. The engine quieted down a lot after the MMO, as well. PU + MMO left a considerable amount of varnish behind; I'll address this in a moment. Dark and slightly opaque when changed at 2750.
Rotella T6 - Running this now. I pulled the VC for inspection, cleaning, and a coat of enamel immediately before putting this in the sump. I pulled it again to inspect the VVT-i gear 56.5 miles later and the varnish was already mostly gone.
What I'm getting at is that it seems like each oil (and the MMO) cleaned something the oils before it didn't. The RP and PP definitely did some cleaning on their own. The PU didn't seem to do much on its own, probably because the PP before it, having similar detergent and dispersant additives to the PU, cleaned up everything the PU wold have cleaned. The high phosphorus content of the MMO cleaned up some deposits the RP, PP, and PU didn't target. None of that targeted the varnish all that effectively, but the T6 seems to be handling that just fine.
My next fill will probably be RP, the PP again, then T6 again, this time thinned with MMO rather than a synthetic 0w20, lather, rinse, repeat. What one leaves behind, the other two will clean up. The RP and T6 will maintain ZDDP plating, the T6 will maintain moly plating, and the rotation of the different detergent and dispersant packs will prevent anything from having time to build up. That's my theory, at least; I'll consider it proven if my next few OCIs after this one don't darken up like the last few.
I think that's a good idea. The different chemistries may help clean what the other left behind.
Originally Posted By: KeMBro2012
Originally Posted By: Mystic
I thought I was doing a service to others here.
So did I. Some people don't know how to appreciate the efforts of others, though.
Mystic. You are. Ignore the naysayers. I read your posts and am always interested in the EXPERIENCES of other members.
Ken. I find it very interesting that mmo had that effect. It's cheap and it seems to work well for most who use it. I'm not that anal about clean however if I thought there was significant build up I would use mmo in a heartbeat.
Thanks for sharing guys