John,
Go back and re-read my post. Let me summarize since you seem to have missed it:
1) I said that I agreed that until he gets the fuel dilution issue under control I agree that 15w40 mineral for short intervals is his best choice;
2) Your original post reads: 250,000 miles is a lot of miles! Now I realise that these engines will run forever but parts are still wearing. I would suspect that a build of deposits in the engine combined with natural hardening of the seals has something to do with it. These engines are known to burn some oil with lots of high speed driveing as well. I think that Roteela-T is at least part of the problem. While it is an OK HDEO their are better. Have you tried Delvac-1 or the cheaper more available Mobil-1 TSUV 5W40?
Your original recommendation is in general and mentions nothing about being specific to his engine. In fact you suggest that he use a synth over an HDEO.
3) Your second posts reads: M1 0W40 is not a good oil for this application at all as your experince has pointed out! M1 0W40 is more like a 0W30 with a nice HTHS then a true 40Wt. onceit has been in use in the engine!
M1EP 15W50, Delvac-1, M1 TSUV 5W40 and Delo 15W40 are all going to probably work better then Rotella-T Synthetic. I have never seen Rotella hold up in an engine that had a propecinity for consuption at all. In a sound engine R-T Syn works fine! Remeber it is a GIII oil not a GIV or GV oil!
If you have not done so already you need to use some Auto-Rx and follow the directions! It is almost guranteed that you have deposit issues, ring issues and seal hardening that is at least contributeing to your consuption issue!!! You would have to have guides and ring worn to h e l l to consume that much oil!
Still discussing synthetics, nothing about him using mineral oil until he figures out what is going on. You go on to bash M1 0w-40 as an inferior oil as not a good choice for this application.
4) When I point out that the 0w-40 works great in this engine design, you change your tune: Cary, 0W40 is obviously not a good choice for his application. If he is burning a quart or more per tank of gas and it does not do this as badly with other oils it is a no brainer. OW40 is known to make an oil burning situation even worse. It might be a fine oil in a vechile that is not diluteing the oil with fuel and does not already have a consuption issue. Remeber his post did not ask anything about wear metals it is about consuption!
And for the first time you mention that he might want to use a HDEO until he gets the problem figured out:
Once he cleans out pre-exsisting deposits and fix's his fuel diloution issue 0W40 might work ok but until then 15W40 is about the only thing that might hold up!
5) I addressed all of your points, but in a fit or irony you don't respond to my statements but instead say:
Cary, You totaly missed the point! You are too interested in being right! No one is talking about "your" LandCruiser! We are talking about his LandCruiser! Their is no way you could defend 0W40 as being the best choice for his application if you had simply read his post! My origanal post did not qualify my statement because I was talking about his application not all Land Cruiser in General! I latter qualified my origanal post for your benifit so tht you could see why I said what I said!
I think the fact speak for themself quite well here. Perhaps you should take your own advice and re-read the thread instead of focusing on being so right.
Cary
