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Originally Posted By: Powerstroke Royal Purple 14w40. My brother has this in his dodge cummins and loves it. Too bad you can't get Amsoil... Why did they go out of business?

Are you saying the CJ-4 oils aren't as good because they have a lower TBN? Also why do you want to stay outside of the Synthetic arena?

If there is no manual available you can't go wrong with a 75W-90 synthetic. Let us know what you do.

Originally Posted By: Whitewolf Originally Posted By: Dirtbikindad393 Is all DEX VI trans fluids synthetic? Is the DEX VI that comes in the '08 Chevy LMM/Allison synthetic or not? It's a problem because the question is how 'synthetic' is defined. We have gone over this several times so if you...

Remember the new oils from Amsoil have raised the TBN for their CJ-4 rated oils. The old DEO 5W-40 used to be a TBN 8. It is now a TBN of 10.4. The brand new DME 15W-40 CJ-4 rated oil that they just came out with is also a TBN of 10.4. With the new formulation on the DEO and the new DME they...

Yes it can be.

Remember that big truck rear ends turn much slower than a light pick up. The ring gear is twice the diameter of the Dana 11.5 inch and the larger tires will also keep the gear from turning as much, thus the gears are turning half the speed of the 11.5 in a pick up. That will significantly reduce...

Is all DEX VI trans fluids synthetic? Is the DEX VI that comes in the '08 Chevy LMM/Allison synthetic or not?

Thank you Dave I have been lurking for quite a while but decided to join in the fun!

Lower Flash Point = cooler running temps and cleaner burn is what I thought but I need some expert advice MR. Newton! I have a guy at a shop telling me that the higher flash point the better the burn and that at lower flash point the oil in the gas will start to vaporize and leave more deposits...

The only thing I haven't seen here is how the 6.0 shears oil very fast and that when oil gets too dirty in a 6.0 it can effect the injectors in that motor without a bypass unit. If I were you I would buy the Amsoil BMK21 and the adpaters to make it work on the 6.0 and then choose the oil you...

I wanted to ask a question about 2 stroke oil. When you have a lower flash point in your premix oil doesn't that mean that it will burn faster & cleaner or do you want a higher flash point in a 2 stroke oil? DBD