Quote:
|
Originally Posted by 732002
Parva: One tank of 87 does not convince me that 93 gives better MPG. Most likely driving conditions or how much the tank was filled before and after checking MPG gave the difference.
I have been tempted to use 87 durning the winter since cars don't ping as much in the cold.
|
You're right... one tank really doesn't mean anything terribly definative. Suppose I'll try it again but prolly not in the real near future.
A couple of MB techs also told me that it's OK to use one tank of 87 to every three tanks of 93; this is fine for this car... also said that it varies from engine model to model. On a '94 W124 w/ 90k on it, the 1 to 3 rule shouldn't be an issue.