ag4ever
Well-known member
I just looked up the 2027 Wrangler 392 maintenance requirements, and it said this:
“We recommend using Mopar® API Certified SAE 0W-40 Full Synthetic Engine Oil which meets the requirements of the manufacturer Material Standard MS-12633. Equivalent full synthetic SAE 0W-40 engine oil can be used but must have the API Donut trademark.”
I don’t recall the last part being in the 2026 manual, where any ‘equivalent’ 0w-40 can be used.
Is that new due to the reformulation of the PUP?
Guess I answered my own question as this is what the 2022 supplement states:
“We recommend using Mopar® API Certified SAE 0W-40 Full Synthetic Engine Oil which meets the requirements of the manufacturer Material Standard MS-A0921. Equivalent full synthetic SAE 0W-40 engine oil can be used but
must have the API Donut trademark.”
It (2022) also states this:
“NOTE:
Hemi engines (6.4L) at times can tick right after
startup and then quiet down after approximately
30 seconds. This is normal and will not harm the
engine. This characteristic can be caused by short
drive cycles. For example, if the vehicle is started
then shut off after driving a short distance. Upon
restarting, you may experience a ticking sound.
Other causes could be if the vehicle is unused for
an extended period of time, incorrect oil, extended
oil changes or extended idling. If the engine
continues to tick or if the Malfunction Indicator
Light (MIL) comes on, see the nearest authorized
dealer.”
So, that’s nice.
“We recommend using Mopar® API Certified SAE 0W-40 Full Synthetic Engine Oil which meets the requirements of the manufacturer Material Standard MS-12633. Equivalent full synthetic SAE 0W-40 engine oil can be used but must have the API Donut trademark.”
I don’t recall the last part being in the 2026 manual, where any ‘equivalent’ 0w-40 can be used.
Is that new due to the reformulation of the PUP?
Guess I answered my own question as this is what the 2022 supplement states:
“We recommend using Mopar® API Certified SAE 0W-40 Full Synthetic Engine Oil which meets the requirements of the manufacturer Material Standard MS-A0921. Equivalent full synthetic SAE 0W-40 engine oil can be used but
must have the API Donut trademark.”
It (2022) also states this:
“NOTE:
Hemi engines (6.4L) at times can tick right after
startup and then quiet down after approximately
30 seconds. This is normal and will not harm the
engine. This characteristic can be caused by short
drive cycles. For example, if the vehicle is started
then shut off after driving a short distance. Upon
restarting, you may experience a ticking sound.
Other causes could be if the vehicle is unused for
an extended period of time, incorrect oil, extended
oil changes or extended idling. If the engine
continues to tick or if the Malfunction Indicator
Light (MIL) comes on, see the nearest authorized
dealer.”
So, that’s nice.
