5-30 vrs 10-30 question for Dodge Journey

[CATERHAM]

Originally Posted By: Jim Allen
Originally Posted By: ARCOgraphite
I might guess you mean a big VI # and not the "W" pumapability; You cant label a 5w as 10w if you are API licensed.


Right. An example is Amsoil HDD. It's really pretty much a straight grade syn base but it performs like a 5W30 with few VIIs.

Amsoil HDD is a 5W-30 and being a diesel oil is much heavier than specified for the Dodge Journey.
Chrysler in specifying a 10W-30 PCMO is still just a light 30wt oil.
For example M1 10W-30 has a HTHSV of only 3.0cP which of course still exceeds Chryslers viscosity requirements being a synthetic oil.
Many 5W-30 oils have a HTHSV of at least 3.1cP including M1 5W-30 which shows how silly the 10W-30 spec' is for the Dodge Journey which give even more credence to the Dilbert Cartoon explanation.

 

[ARCOgraphite]

I would agree that the requirement to have a 10w-30 ILASC GF5 ruined most benefits of this oil in light truck operation. SO I suppose can use Shell T5 - though that may or may NOT be the chrysler engineer's intent unless we interview the powertrain engineer (who may very well NOT be a tribilogist in training)