<strong>Yahoo Message Number: 95052</strong>I haven't done a service on my Allure since we got it last year (was done right as we purchased it) but is now due. We are just at 40k miles.<br/><br/>Is anyone pulling samples for analysis? Our engine is a Cummins 400 ISL, is there a valve someplace to easily pull a sample for the analysis? I need about 4 oz. I know It can be done through the...