I run 195°F thermostats, unmolested, and I get heat from the heater within a couple of blocks and it very quickly warms up to temp, which is 195°F.

Interesting thread. I have a Mocal oil heat exchanger and I've always been concerned that my oil temp runs a little on the low side. I don't have an oil temp gauge but in traffic on a warm SoCal day my water temp rarely goes above 175° and it takes 10 to 15 minutes before my oil pressure moves off the 95 psi mark at idle and settles down to 35 or 40 psi. 

The Mocal unit is compact and the hoses rarely get in the way. Still, it might be overkill and perhaps I'll consider blocking it off for street driving and put it back online during track days. I'd really like to see the water temp up in the 185 to 190 range.

In addition to not being needed to cool the oil, an oil cooler heats up the air headed through the radiator.

Agree with Kermit.... In the "old" days, if oil got above a certain temp, it would not recover it's viscosity.  Not at all true today, so unless you really need the extra cooling (and there are better ways to accomplish that too!), an oil cooler is a nice period correct item that "S-ifies" any Mini.  My main reason for not running one is what a giant pain it is to have it and all it's plumbing in the way all the time!  Make a simple oil change very much not simple!

I wanted to say that....

Alex as i am sure you remember he would have got a lot of other parts too Dizzy, carb, suspension parts and other items i forget come to mind but again would not give an address to several board member who tried to help him in the early days of his presence here.

BTW "specialist" WRONG AGAIN !!!! A wire falling off a connector does not indicate a bad fuse and also for the benefit of readers of the utter crap you spew out fuses do not need replacing every couple of years.

You don't need an oil cooler on a street mini with modern oils unless you are driving 10, 10's for over 20 or 25 minutes or a maybe having a turbo still driving 10, 10's.  An oil cooler on a street mini will reduce the longevity of your engine as the oil will be too cool for too long.  An oilstat will greatly help but the plumbing and cost probably isn't worth it.  SO, unless you drive it like you stole it, block it off.

"....When and which Mini's had oil coolers?..."

Basically only the Cooper S models.. Initially as an option then as standard fit.. Don't really know what happened with the MkIII.

The early Oz Clubman GT (which was an S in a suit) also had them..

Cheers, Ian

Send Malcom your name and address and I'm sure he would post it to you.

it's either the fuse is old, it has lost it's integrity and durability then when the electricity fluctuates to about 14.0v the filament breaks, a new fuse won't break that easily. this serves as a lesson to ALL, if you think your fuse is old, say about 1-2years old, better replace them before they leave you stranded in ther middle of the road(good if it's on the side of the road).

And to comment on Nkerr's oil temperature issue,, my mini dont have an oil cooler(because sir mal didnt send me his, as he promised) aaanyway, as i was saying, my mini dont have oil cooler, and the winter temp doesnt harm my mini at all, i drive at 32F temp here in arizona, and i dont have my front grill on, which means the entire cool air gets into the engine and radiator, and my temp gauge goes down to as low as 1 line, then my oil pressure goes up to about 70-80% and the mini runs like a champ(although i dunno what this american slang idiomatic expression means really). to me, low temperature doesnt harm the engine, it may result to a bad gas mileage yes, but not a whole lot, the term optimum temperature might come into play but, who knows whats really going on inside an engine, especially inside an A+ engine., as far as i know, and in my opinion heat and friction is the no.1 enemy of any machine, not cold temperature. i'd rather drive on a very cold temp rather than hot temp where my oil pressure goes down because the oil thins when to hot.(no, dont say that my bearings were shot, dont say bad word$$$,lol)

sorry, don't know the answer to your question, hopefully someone will chime in soon with that

it sort of sounded like you were implying another question about why your oil warms up so much later than you water:  when running an oil cooler it is a good idea to also fit an oil thermostat in the lines so it isn't over cooled, this is especially a concern when driven only short distances because until the oil gets up to temperature there is acidic moisture which condenses during initial start up which needs to be burned off over some running time at temp

glad to hear that your fuel pump issue was so easily solved

Got me to wondering today as I went to the grocery store in my Mini.  When and which Mini's had oil coolers?  Mine has one.  I notice the water temp comes up in about 2 miles but the oil press doesn't start to to come down for 9-10 miles depending on where I'm driving?

She quit on me coming back.  Popped the hood and couldn't smell any fuel and that's what it felt like.  Full of frozen food so call a friend.  Then thought, I think she has an electric fuel pump so looked at the fuse block and sure enough there was a wire off.  Slide it back on and was running again.  Ahhh old cars, they just like attention.