Spartan tuned with oil leak - Advice needed

[mongoose]

Gents,

Need some advice here, 2008 job 1 6.4l with ~16K mi. Spartan tuned since 5K mi with only the 250 tune run. The truck has not been driven hard and was primarily tuned to stop the oil dilution problem due to the regen. Small amount of oil leaking from the rear of the motor. I have read that it could be a number of things including the bed plate. Before I return this truck to stock and take it in for warranty is there anything special I should do to enhance my chances that they will not even suspect that a tuner was used on the truck and potentially deny the warranty claim? Sadly the DOC looks new.....

Anybody know any good dealerships in MA or NH?

Thanks in advance!

[sportsfreaked]

I would drive it around for 100 miles or so after returned to stock to put some miles on the factory pcm. I would also run thru some mud or dirt something to dirty up the bottom of the truck so the dpf and everyhting else looks like it has been there the whole time. I do not know if this would work but I would think it would give you a better chance of them not looking for a tuner.
Just my 2 cents. Good luck. Let us know what happens!