I have a 2009 Dodge Ram with 5.7 litre Hemi and about 65,000 miles on it. Just had a problem with one of the roller hydraulic lifters--it collapsed causing a loud ticking/knocking sound and wear on a valve. Definitely not normal for the Hemi engine which is robust. Replacement involves removing the heads, etc. Expensive repair (Canadian trucks don't get the lifetime powertrain that US owners get). I may get goodwill warranty from Chrysler Canada--they're looking into it. Dealer and Chrysler can't explain how or why the lifter would fail. In over 30 years of driving I've never had a lifter problem in any vehicle...many of them high mileage. I'm meticulous with my oil changes--I only use the 5w20 recommended weight (MDS engine) and always full synthetic. Most recently Castrol Edge. I've also used Mobil 1 and Pennzoil Platinum. Oil is changed before the oil life monitor comes on...I typically change at 5,000 miles. I initially used the OEM Mopar filters which are very good, but access to the oil filter on these trucks is difficult especially trying to get a filter wrench on them. As a result on two or three oil changes I used Fram filters which have the easy-to-grip surface. I'm not familiar with the full operation of roller hydraulic lifters and what role oil would play in longevity. That's my first question. The second question is, if this was your truck what oil would you run going forward? Other than this lifter issue, the truck has been great...very reliable and I plan to keep it a long time. Appreciate any input. Thank you.