Dexron III H...synth blend???

[mike1qaz]

Are the improvements in the Dex III H fluids sufficient to allow it to be called a synth blend ATF or was the spec an improvement to the AW/EP additives?

I have one vehicle that can use OTC ATF fluid and will probably buy the jug of Pennz D3H from Wallys.

Many on this site seem to have a very good opinion of Pennz motor oils, does the same apply towards there ATF. I've seen posts recommending Chevron ATF, but it isn't available in any of the places I shop.

 

[G-MAN]

I think with the new low temp requirements of Dexron-IIIH, along with the improved oxidation and shear stability specs, this fluid (like Mercon V) will have to be made with some Group III in the base oil blend.

 

[unDummy]

If it was a blend, the "marketing dept" would plaster it all over the bottles.

I guess that we're seeing a movement away from GroupI and I+. Any spec that increases the amount of higher group oils(most likely group II and II+) is better for us(longer lasting, cleaner, and better performing trannies).

 

[Ray H]

Both Mercon V and Mopar ATF+4 were listed as ATFs having Group III content back in 1999 in two white papers put out by Chevron: "The Synthetic Nature of Group III Base Oils", and its companion study, "The Evolution of Base Oil Technology". It would seem that, unlike motor oils, the blenders have been a bit more cautious in bandying the term, "synthetic" or "synthetic blend" regarding ATFs with Group III content. Poor Group III - it gets no love, but many grudgingly allow that it works remarkably well.