DanW
Well-Known Member
- Thread starter
- #1
I've been speaking to a friend I met on Bitog who was on the original Pentastar design team. I asked him last night if he was familiar with the epidemic of dealerships overfilling the new Pentastar Upgrade (the latest Pentastar that is in our JL's), noting that the gen 1 Pentastar takes 6 quarts and the PUG takes 5, and that most techs don't know about the capacity change.
If you've had this happen, you will be relieved to read his response:
" ...yes. that is why I change my own oil (and use the oil udder lol) too. The thing they get away with is all Chrysler vehicles can meet ALL...and I mean ALL tests with +/- 1qt in the sump. "
He went on to say that you still could potentially have a problem "under certain conditions" if the crank shaft contacts oil due to overfilling and foams it. What he means is at extreme angles. Even then, he said, it probably won't do damage and "will pass" but he still wouldn't risk it.
He did say that the Gen 1 Pentastar service manual was updated to account for the slow drain of oil from the engine during changes. He thinks it was revised to slighly less than 6 quarts, to account for not all of it getting out in the short drain time allowed for dealer service.
Btw, his reference in the quote is to the Oil Udder product, which is a company he co-owns that sells a device to make easier and help avoid messes when changing traditional spin-on oil filters.
So now we know the safety margin that FCA builds into their engine oil capacity. +/- 1 quart. So don't fret when you see it is overfilled. Personally, I'd drain it off to get it right or at least close, but for the many, many out there that are getting overfilled by their dealerships and don't know it, they should be ok. If you are off-roading, then by all means, drain it down to the proper specification.
@CarbonSteel @Rhinebeck01
If you've had this happen, you will be relieved to read his response:
" ...yes. that is why I change my own oil (and use the oil udder lol) too. The thing they get away with is all Chrysler vehicles can meet ALL...and I mean ALL tests with +/- 1qt in the sump. "
He went on to say that you still could potentially have a problem "under certain conditions" if the crank shaft contacts oil due to overfilling and foams it. What he means is at extreme angles. Even then, he said, it probably won't do damage and "will pass" but he still wouldn't risk it.
He did say that the Gen 1 Pentastar service manual was updated to account for the slow drain of oil from the engine during changes. He thinks it was revised to slighly less than 6 quarts, to account for not all of it getting out in the short drain time allowed for dealer service.
Btw, his reference in the quote is to the Oil Udder product, which is a company he co-owns that sells a device to make easier and help avoid messes when changing traditional spin-on oil filters.
So now we know the safety margin that FCA builds into their engine oil capacity. +/- 1 quart. So don't fret when you see it is overfilled. Personally, I'd drain it off to get it right or at least close, but for the many, many out there that are getting overfilled by their dealerships and don't know it, they should be ok. If you are off-roading, then by all means, drain it down to the proper specification.
@CarbonSteel @Rhinebeck01
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