sometimes the service providers use wrong engine oil, it can make 5 to 10% more consumption, or even forgot to change the oil-filter, have one case in Sacramento, the filter just after service got jam and the oil circulation stopped, - nearly spoil engine...
so choose the proper service !
the lower your rear axle ratio, the worse your mileage.
It can, and usually it will make it worse.
A v-8 will always get worse mileage than a v-6. If you're worried about gas mileage, don't be driving a Camaro. i have a 92 rs and a 90 rs. i get about 25 mpg
dense cold air requires more fuel
Yes, I would service a car with this mileage.
After which mileage mercedes c300 needs a b1 service?
no if anything it is worse because of the added weight
It could make it better, but nost likely make it worse.
Check ingine light and your gas mileage get worse.
every 20 000
It depends on the mileage of the car and what has or has not be done already.