I wouldn't trust any 'confident stochastic next-word predictor' to tell me fact. There are official sources of information for these kinds of car maintenance questions.

Better than asking your backyard mechanic buddy who believes that you don't need anything other than 10W40 or something like that. You have always had to know who to trust and what level of work you need to do in order to get to an answer which is satisfactory. And in this case, Claude cited the manufacturer's bulletin which is the actual best source of truth that you're talking about.

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