I think it would have taken Me longer to run the truck down & have a shop change the oil,than to just flush with Mark's instructions at home.no special tools or skills needed.

That ain't all I was doing with the truck, Crop. Tranny was just a part.

No idea how many times. If you're really interested to see what kind of difference 8 qts made, send a sample in to blackstone the next time you decide to drain the pan and see what they tell you about the condition of the fluid.

Both the Amsoil and BG Products are acceptable to use in a Mercon V transmission...they both meet or exceed the Mercon V specs.

Got it. Another old wife's tale debunked......:-wink

i use plain old valvoline trans fluid. costs 1/4 the price. i refuse to pay for a name.

well thanks Steve, most people call me a professional "something else"

LOL. I thought "Valvoline" WAS a brand name, as in some people will only use Valvoline versus some other brand name. Ha!

I agree...there's plenty of good stuff out there. The higher prices usually mean higher marketing / advertising costs. I used to be a big proponent of Amsoil products, and still do like their stuff, but use it a lot less now than in the past. The only negative thing I will say about them is that it costs A LOT more than dino products and you can't find it just anywhere when you need it RIGHT NOW. When Joey at Terminator Engineering saw my two HPOPs...one from a truck with dino oil only and 200k miles, and the other from a truck with Amsoil only and 100k miles...he said they both looked excellent with little wear. So I said to myself, well...guess I will go with dino on BOTH trucks!

that is what i mean, with amsoil you are buying a name.
i say i use valvoline, but i actually use oil made by valvoline but packaged for someone else.
but it does the same thing at 1/4 the cost.

I've done some testing on private label stuff that comes from valvoline on the motor oil side and it seemed to do pretty well. But remember just because it comes from the Valvoline factory doesn't mean it has the same additive package as the blue bottle.

Bottling plants bottle stuff according to a recipe. The generics are never exactly the same as the original. Some are pretty darn close, others are just a custom recipe.

Of course the other side of the coin is, as long as it meets the spec, then it meets the spec and additive packages are just fluff.

Napa/valvoline all fleet 15-40.
it is made by valvoline, and has a napa label put on the bottle instead of the valvoline label.
it comes off the same bottling line. the only difference is the label.

Valvoline makes Carquest 15w-40 too. But again, same line doesn't mean it's the same oil.