Substitute for Mopar ATF-4
- Thread starter Bob.Gibson
- Start date
Jerry, any particular reason? It says Chrysler MS 9602 ATF+4 on the back. Just curious, and I'm unfamiliar with Penrite.
The back label lists every conceivable ATF type. I'm absolutely not buying it's 100% compatible with and a suitable/good replacement for every single one of those. Neither does the label claim it is, it just shows all of them and by that infers it is. I'm not buying it. Not to mention being "compatible" with something doesn't mean anything more than it can probably be added in a pinch. But note that nowhere does it actually say anything about being "compatible" with all those different types of ATF.
There are differences in the various ATF types so one type cannot possibly be a good replacement for all of them. To me it reeks of snake oil.
I would have no issues running it. We already have to add a friction modifier to the Mopar ATF+4 to slow down clutch judder. If you followed the transition from ATF+3 to the +4 spec, they mainly increased the shear stability to keep the viscosity up over a longer service interval. That and most don't follow that the +4 is either a full synthetic or mostly synthetic. If you read the spec on the Pen stuff, they show very similar logic to why ATF+4 was developed. I doubt I would pick it over here if it was sitting beside Mopar, but if I was in Australia and had to pay what they want for Mopar over there, I'd use it in a heartbeat.
The bottle in your screenshot of Supertech (Walmart) is DEXRON-III and Mercon equivalent. You need ATF+4.
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X2. If it doesn't say ATF+4 in big letters on the front of the bottle it's the wrong stuff. I don't care if in small letters somewhere on its back label it says "compatible with ATF4". That doesn't mean it is ATF+4 which is the only correct type for our Jeep automatics.
Understood 100% That said @mrblaine answered my question. At 30% savings I’ll use the Walmart brand ATF+4.
Additional question
Does anyone know where these products are sourced from?
If’n I said I’m interested in USA sourced petroleum products is there common knowledge to where it all comes from?
I know you're not talkiing about Warren Ohio. Any oil or chemical additives ever made or used there have been dumped into the Mahoning River so long ago they say it's sometimes safe to eat the fish.
To earn the ATF+4 designation which is from Chrysler it has to be made to precisely match the ATF+4 Chrysler spec. If I needed ATF+4 and saw a 7-11 branded ATF+4 in a 7-11 store I'd happily add it to my transmission.
I gotta ask, what makes you happy at 7-11, a bottle of screwdriver or MD 20/20?
FWIW those are the only two I recall seeing at 7-11 so maybe there are other choices.
Good catch! He was wrong that it can be "ordinary" DEXRON. Can't be DEXRON I or II. It works by changing the dexterity of the oil by adding 1 ingredient to DEXRON-III which turns it into ATF+4.
Edit: Fixed typo that it can't be I or II.
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