Car Information:
Lexus IS F
Year: 2010
Engine Size: 5.0L
Trans: Automatic

Issue / Question:
I’ve got about 5k miles on my IS F, just took it into the dealer for my “free” first oil change this week and, as often happens, they overfilled the crank case. (seems to be a trend with Lexus dealers which is why I like to change my own oil)

I am more than anxious to get the new car on the Amsoil diet but continue to get conflicting information on when it’s good to do this. Some say now, some say wait until the motor clocks about 7k to 10k miles. What do you guys think? I am ready to do it now but I switched to syn oil too soon on my old A4 and it wound up using a lot of oil which the service adviser blamed on the premature switch to Amsoil.

Answer:
5,000 miles is plenty. If it’s not using oil now, it won’t when you switch over to Amsoil, I recommend 0-W-30. Change it every 10 to 12 K or in accordance with the oil monitoring system.

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