Let's say a vehicle calls for 5w-30. Let's say you're using synthetics. Assuming you aren't trying to push to a very high mileage OCI, is there anything 0w-40 wouldn't do better? If a vehicle was built before 0w-40 was an option, might they have spec'd it for that were it available then?
My (limited) understanding is that the greater the spread, the more the oil is 'propped up' by additives that can break down. Is this accurate? So, assuming you're changing oil within 5-7.5k miles and 12-18 months, would the 0w-40 do better?
(Vehicle is 3.4, Toyota T100. But am curious in general also.)
My (limited) understanding is that the greater the spread, the more the oil is 'propped up' by additives that can break down. Is this accurate? So, assuming you're changing oil within 5-7.5k miles and 12-18 months, would the 0w-40 do better?
(Vehicle is 3.4, Toyota T100. But am curious in general also.)
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