Mobil Multipurpose vs. Mobil 1 ATF

[airman]

I went and bought 24 qt of Multipurpose ATF to do the transmission flush. Then I noticed that everybody here talks Mobil 1 ATF specifically. Shame on me not paying attention, I thought there's only one Mobil ATF The question is this fluid any good and what can be used for or I just go ahead and return it? The link is about this product:http://www.mobil.com/USA-Engli...F.asp

[maxnix]

Compare specifications to Mobil 1 ATF.

Perhaps Fred, TexasOil, or Q45tech can comment on the different specifications. From my unqulified eye, it looks a little better at the temperature extremes. But I bet that is only part of the story.

[Q45tech]

Dexron III is just a minimum specification for the multi dozens of companies that make and market ATF. Since 95% of the product is the base stock oil, what it's made off is very important...........in its ability to stay stable longer.

If a replacement transmission cost $2800-$3,000, each year you defer is worth roughly $280..........maybe twice that since the remanned may only have a life half as long as the brand new unit installed at the factory.

If I offered you an insurance policy that would cost $280 per year and replace the transmission free [the catch is you must start paying at 4 years or 60k]..........I would lose money statistically...........if I made you pay for an annual flush and pan drop/clean I would probably make money............assuming you didn't keep the car beyond 200,000 miles.

People worry about what they spend on repairs but don't add money to the reserve for things that didn't fail in that year.

[airman]

hm... so to pour or not to pour, that is the question.Let's say if I'll do another flush at the end of the year.

[Q451990]

I think any fluid will be fine as long as you swap it when it starts to change colors. Just keep a sample on hand to do a side by side test with a drop from the dipstick and a drop of new. When the color of the stuff in the car starts to change - it's time for another flush...

Heath

[maxnix]

hm... so to pour or not to pour, that is the question.Let's say if I'll do another flush at the end of the year.

Or you could flush with the multi-purpose, drop the pan and replace the screen, and flush with Mobil 1 while it is still hooked-up.__________________Brian1995 Q45 & Q45t

[PalmerWMD]

Or you could flush with the multi-purpose, drop the pan and replace the screen, and flush with Mobil 1 while it is still hooked-up.

That would be my solution also.The MOBIl regular ATF is not bad but with a heavy powerful car you wanna put in the good stuff.Also helps reduce pressure fulctiation internal to the transmission in temp extremes as the viscosity of a full syn ATF wont change quite as drastically as that of a regulr ATF.

Also breakdown of fluid will be less = less varnish in transmission.

Fred...

[airman]

OK, went and bought right ATF - Mobil 1 12 qt must be enough, right?

This is what I'm gonna ask for the tech:

1. Drop the pan and clean, replace filter.2. Flush with conventional Mobil.3. If the color is not perfect - flush again (I have 24 qts conventional Mobil)4. Refill with Mobil 1.

Does it sound reasonable?

One more question:Is PS fluid flush can be easly done at home without special tools or I should ask dealer to do it as well?

[maxnix]

OK, went and bought right ATF - Mobil 1 12 qt must be enough, right?

This is what I'm gonna ask for the tech:

1. Drop the pan and clean, replace filter.2. Flush with conventional Mobil.3. If the color is not perfect - flush again (I have 24 qts conventional Mobil)4. Refill with Mobil 1.

Does it sound reasonable?

One more question:Is PS fluid flush can be easly done at home without special tools or I should ask dealer to do it as well?

1.) Flush first, then drop pan and replace filter. Unless you have many miles and screen is dirty and pan is scummy, then do pan drop (and cleaning) and screen replacement first. You can get an indication by the color and condition of your present ATF. Browner is badder.4.) Final flush with Mobil1, as that is the only way to replace the ATF. It is really not a flush but a fluid exchange.

Depending on the machine, you need one gallon extra to flush. So 14 Qts.

Look for someone who has the Snap-On PS flush machine. If your fluid is in good shape, then a reservoir evacuation and fluid replacement while rotating the wheels lock to lock is sufficient. If it is brown, or you have leaks, then the hook-up to the high pressure line is required. More time and more money. A lot cheaper than replacing a rack. You will need 4 qts. of Mobil1 ATF.

Procedure for Pre 1995 t models and all a models is different as is the fluid quantities.__________________Brian1995 Q45 & Q45t

[airman]

1.) Flush first, then drop pan and replace filter. Unless you have many miles and screen is dirty and pan is scummy, then do pan drop (and cleaning) and screen replacement first. You can get an indication by the color and condition of your present ATF. Browner is badder.

Hm. Dennis stated that cleaning and filter replacement should be done first. That's how they do at T3.

Quote »4.) Final flush with Mobil1, as that is the only way to replace the ATF. It is really not a flush but a fluid exchange.Depending on the machine, you need one gallon extra to flush. So 14 Qts.[/quote]

So, the fluid after the second flush remains in transmission?

Quote »Look for someone who has the Snap-On PS flush machine. If your fluid is in good shape, then a reservoir evacuation and fluid replacement while rotating the wheels lock to lock is sufficient. If it is brown, or you have leaks, then the hook-up to the high pressure line is required. More time and more money. A lot cheaper than replacing a rack. You will need 4 qts. of Mobil1 ATF.

Procedure for Pre 1995 t models and all a models is different as is the fluid quantities. [/quote]

Thank you, Brian

[Q45tech]

Just like tires and cars: synthetics are 10-15% better for double or triple the price ..............that's how the Premium Market works!

[airman]

I've done double flush, as you suggested. Improvement is noticable. Although I still feel the shift but it much more smoother. Thank you, guys!I had hard time asking the dealer to do exactly what I want and convincing them not to charge triple for that Overall it was not pleasant experience so I'd like to find an independent shop that can work on Qs next time.

[madmax88]

red line looks like the best yes. synthetic D4 ATF