
10W40 oil instead of 5W40
I'm having a hard time finding decently priced 5W40 oil that meets MS-10902 over here in the UK. The only one I found in stock is Liqui Moli and two 5 litre jugs cost the equivalent of 250 USD.
However, I found some Ravenol oil that meets the MS-10902 spec but it's 10W40 instead of 5W40. Has anybody run 10W40 in their Ecodiesels?
These guys say that 10W40 might be better for high mileage diesel WK2 but they're from Australia so their Jeeps probably don't have to deal with low temps? https://gdlauto.com.au/recommended-oils-and-filters-for-wk2-ecodiesel-grand-cherokee-owners/