"General Schvantzkoph" > wrote in message
news oil change for my new 300C, should I do standard
> or synthetic? I've used Mobil 1 for the past 30 years, does it make sense
> to continue using it or are modern 5W-20 oils as good or better then Mobil
> 1?

The UOAs for SL/SM IL-4 dino 5w-20s are just as good as for synth. The
owners manual says you can use synth, but you have to change it at the Sched
A or B intervals to maintain your warranty, so no real savings in terms of
fewer changes. Your call...

bob