I have a 2003 with the 3.9 quart recommendation, and I am not worried about it. I just pour in an even gallon. It is more important to make sure there's at least what the dipstick wants, and that the oil and filter are changed regularly. There may be an advantage to having that extra pint of oil in there, but there are disadvantages to having too much. I don't think an extra pint would hurt. If he's worried about it, tell him to put in the extra pint, scratch a mark on his dipstick.
|Quote, originally posted by chrisp Â»|
|They just moved the FULL mark a bit further up the stick and .....Wallah... Your vibe now holds 4.4 Qts.|
I wouldn't be too sure about that. I read a while back that they changed the size of the oil pan, thus increasing the oil amount. Best check to see if that is accurate. Over filling oil can be just as bad as not having enough.
|Quote, originally posted by n2ho Â»|
|do they need more oil to pour into?|
Need? no. They need enough oil to reach the lower mark on the dipstick. Your measurements indicate that level has not changed, so the engines do not need the extra pint.
Then the question is will they benefit from the extra pint. chrisp says yes, marginally.
Or it could be something as mundane as changing their dipstick vendors. Or the new, off the shelf dispstick that works for other engines fits and has slightly different markings. Now the full line will register 4.4q instead of 3.9q. Is this an issue? No.
However, I concur that it's better to underfill than overfill. Your friend is best sticking with 4qs flat. If you fill it too full, foaming can become a big issue quick. Tell him to just keep doing what he's been doing.
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