Well believe this or not but I am not really sure how many miles I have on my 235, but it has to be well over 100,000 and say around 3 or 4 years ago I started using HI mileage 10w 40 valvoline motor oil, not a 100% but I would say it has slowed my leaks down considerably, that was not my intention to use it, but my dip stick seems to stay in a good safe area for months on in.
