Murray does not have a sump. He has a remote oil cooler, what they call a 12 pass, which means that the oil goes back and forth 12 times though the cooling fins before returning to the engine. This calls for hoses and clamps and such, which greatly increasing the chance of leaks and hose failures. I also have a remote filter which raises Murray's oil capacity to near 5 quarts. After running at highway speeds for hours Murray rarely gets hotter than 180 degrees. I did all this after my first engine failed because of low oil pressure due to the builder leaving out the plunger in the deep oil relief valve. When I built the new engine I put in all this out of superstition and paranoia that my oil may get too hot. And when he is on his trailer, he runs really cool. In your Bay bus, Eric is correct that you should not have clearance problems, you probably have stuff that hands down farther than 2 3/4". -----Original Message----- From: tcb-bounce@xxxxxxxxxxxxx [mailto:tcb-bounce@xxxxxxxxxxxxx] On Behalf Of Julie Sent: Wednesday, July 21, 2010 7:17 AM To: tcb@xxxxxxxxxxxxx Subject: [tcb] Deep oil sump The '68 Bus of mine is homemade camper, a one of a kind which is cool but it is much heavier than let's say a Westy. It has been suggested to me to perhaps add a deep oil sump, with the idea being that more oil will help the engine that will be working hard moving such a heavy beast stay cooler. Do you think it is a good idea? When talking to my local parts guy he wanted to make sure that I am aware that the deep oil sump adds up to 2 3/4" to the bottom of the engine. There are some choices that are thinner but then hold less extra oil. Should I be worried about extending the engine closer to the ground? I don't imagine doing any crazy off roading adventures with this Bus, it is currently in not-so-great-a-shape so it is odd just imagining it moving at all. Julie