It depends on if you are using synthetic oil or not. But i have had a Hummer to a GL550. So i would say it would be between $50 (small reserve) to about $80 for big trucks. That usually includes refilling all other reserves and checking tires. But you are in and out usually so my time is more important.
Wow, got me. I would call them.
$55 +tax and it's fully synthetic oil hope this helps
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