Marty.

Thanks for the reply as I value your insight. The 15K OC interval was instructed to me from my dealer, whom I purchased the '99 on starmark. I questioned the "extended" length, even knowing it was synth. The service mgr demonstratively said he would call the factory and let me have the nice German man tell me the same.

If it is indeed, the FSS takes the cumulative driving conditions & provides the optimium OC, I will be going that direction. Good to know after 170K of driving.

Thanks for the clarification. BTW my bus DD 6V92 w/7.5 gal + filter is under $100...

Gary

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Gary
Experience is something you get, Just after you needed it....
'99 E300 295K, '83 300D 220K, '75 240D 185K sold
'80 MCI Bus Conv DD 6V92TA, w/4 cyl. Kubota diesel GenSet 12.5KW