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Originally Posted by BigShug681 Why does it matter if the OP has sludge or not? It's the OP's prerogative so just answer his question, no need to interrogate the OP as if prematurely cleaning an engine is a major crime. Thanks... My thoughts exactly...

Which Valvoline is that? (ring packs and such)...

Originally Posted by jongies3 T6 should do nicely, even conventional Rotella 15W-40 is chocked full of detergents to help manage soot levels in a diesel engine. I feel like going this way so it is gradual... With it being so old and with 300k miles, I am afraid of being too aggressive which...

I understand... That is why I stated that it did have light sludge and no was not beating around the bush about it... Thanks for the help...

Here is one from the other day...

Yes, the engine has sludge. No need for pics, I know about the baffle, what sludge looks like, etc... I had to replace the spark plug seals and reseal the valve covers. Believe me, like I said in the opening statement that it is sludge and the previous owner had no idea.

My old Toyota Landcruiser 3fe (1988) needs an oil that is a bit higher in zinc like Rotella T4/T6 or Valvoline VR1 racing oil... Which one of these or is there another one with decent zinc levels will clean the best? Looks like it was run with 10w30 dino oil for ages and it has some baked on...

Originally Posted by addyguy Originally Posted by kschachn And here we go again "cleaning up" and engine that doesn't have a confirmed problem. The OP has been asked about it but hasn't answered. +1 to this. Very few engines these days actually have visual sludge in them. OP is asked to...

Originally Posted By: Bottom_Feeder Originally Posted By: DPRespecki Thinking of doing 1-3 short oil change intervals to clean it up a bit before I do a lot of long driving... This does absolutely nothing. Motor oil is a lubricant, not a cleaning solvent. Just do regular oil changes with a...

PP from walmart? Is that penzoil or ? As for the supertech, supertech synthetic or conventional? Thanks..

Hi... Just acquired a new to me 2002 Tacoma with the v6 3.4 It has some light sludge and was wondering what current oils are considered best for good detergent - cleaning attributes? Thinking of doing 1-3 short oil change intervals to clean it up a bit before I do a lot of long driving...