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Yeah, but deviate from manufacturers recommendations, and see how quickly your warranty gets invalidated.
I think it has more to do with design, pressure, and volume than it does fuel economy. If they need to squeak better economy out of it, I think there are a lot more places to look than advising thin oil. They know if they start advising oil that's too thin, they could have a **** storm on their hands with early failures.
Seems to me like they wont address it anyways, so the warranty point in moot. I'd rather prevent future issues. It also helps that my other vehicle requires 5w20 oil, and I just keep the receipts for that in my ram owners manual. I HIGHLY doubt they will request an Oil analysis. I also bought an extended warranty that allows you to take it to any certified mechanic, not just a FCA dealer
Good point. I'm wondering, if one purchases an extended warranty that is a top tier level, could this be a repair that's covered?
Exactly!
I picked my truck up yesterday after they had it for 6 days saying "Unable to duplicate". I then asked to speak to the Service Manager who tried to tell me the noise was normal and proceeded to grab 3 sets of keys and told me to come with him out on the lot. He starts the first truck, no clatter. He then starts the 2nd truck, smooth no noise. He then starts a 3rd truck! Again smooth no lifter rattle. I look at him and said if mine sounded like these 3 trucks I wouldn't be here. All of the truck he started were 5th Gens. I wonder if these have better lifters than the Classics or 4th gens?
He then told me they repair 10 Hemi engines a week for lifter,cam failures! That would be about 500 engines a year at one dealer! And they have to use aftermarket lifters because of the national backorder.
So when I get in my truck to drive off and start it, the lifters rattle. Here's a video from today that I took after getting it back from the dealer yesterday.
How could they not duplicate this?!
https://www.youtube.com/watch?v=fTjiDtIIIZQ
I just got back from picking my truck up. They said everything sounded normal and my lifters do make noise but not an excessive amount or for a prolonged period of time. I talked to a tech that listened to the truck when they started it this morning and showed him the video I took. He said it definitely did not sound like that when they started it and offered to keep it longer or I could bring it back if it becomes more consistent.