Quote:
Originally Posted by marco5
The factory manual/book no longer applies to these vehicles at their current age and mileage.
Change the oil often, around 3k miles, use quality filters and oil and you'll be safe. Yes, this is my opinion, along with Kent (someone who has taken 100's of these engines apart).
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The factory maintenance manual absolutely still applies to these vehicles. If it was good enough to keep them going when new in the 80s with inferior lubricants, coolants, detergents, and protectants, then the schedule that DB recommended then is MORE than adequate now.
I subscribe to Kent's channel and I've bought some of his products. He definitely knows what he's doing and I respect his opinion most of the time. However, he's also preying on people like you making you think that OM617 is made of glass and if you so much as look at it sideways it'll break and you'll be a saaaaaaaaaaad panda. That just isn't true, it's mostly marketing to bolster sales of his products. He isn't wrong, he isn't even being dishonest, he's just promoting caution to people who don't know otherwise.