Hello NAM!

Now that I'm into day 1 of mini clubman ownership, I'd like to ask a silly question about oil change intervals.

At the dealership, I asked and was told to do 8,000 mile OCIs. Coming from my old school Benzes, this seems obscene.
However, the world has long changed since my beloved 80s monstrosities and I understand that this might be ok.

The car in question is a 2016 Clubman S with 45k on it. Should I do 5k or just go to 8k ?

I appreciate the advice, thank you!

I always do 5k or 6 months.
Is it needed? Maybe not, but it's sure worth the extra money to me for the peace of mind.

While I will deffer to smarter people to follow, I think it is wise to go with 5,000 miles or 12 months and full synthetic for a MINI. (Probably smarter to go with a shorter number of months.)

The time limit is necessary since water from humidity gets into oil over time which is not good for the engine and is not addressed by synthetic oil.

A few extra oil changes are cheap compared to the problems they avoid.

If you are going to do the changes yourself, 5,000 miles is a good round number and easy to keep track of.

Also, get a couple oil changes into the car, and at about 15-20,000 miles have a Blackstone oil analysis performed. They will be able tot ell you how the oil is aging based on your driving conditions. After the oil analysis is performed, Blackstone will sometime recommend a longer change interval based on usage. It will give you a good idea of how the engine is aging, and give you an indication of how long it will run.

Interestingly, I used to pull samples from my old VW TDI (which used full synthetic oil). I would send the oil sample off to Blackstone Labs for analysis. It's kind of a nerdy thing to do, but getting oil tested can tell if something is going wrong with a motor (camshaft wear, bad fuel, other premature component wear), that might not otherwise be obvious until something catastrophic happens.

One report I just pulled up: the oil had 8,200 miles on it, had been in the vehicle for 1.5 years. The oil had 0.0% moisture content. The Blackstone report indicated that I could keep driving the oil until the 10,000 mile change interval, as the oil additives and viscosity were well within spec. I decided to change the oil anyway, but take this as a datapoint: moisture doesn't seem to infiltrate motor oil with time, and modern synthetic oils do much better at dealing with oxidation than the sludge of the 80s and early 90s.

I'm kind of bummed that our Gen3 minis don't have an oil dipstick. I'd like to pull samples of my oil with time and post some Blackstone reports here.

As per the factory OCIs for my 2018 JCW are 10K miles, but I change the oil (have it changed) at the dealer every 5K miles. Because I guess the car is "new" the 10K oil change was free (along with tire rotation). The car is around 2K miles from having 20K miles and its next oil change. The oil is the BMW Long Life oil, 0w-20 synthetic.

Without knowing your usage where you live it is hard to say 8K miles is ok or you need to consider more frequent changes.

Generally speaking short trips, high humidity, lots of idling, or on the other end lots of high RPMs (like tracking) it is generally advisable to shorten the change interval.

Temperature and humidity and usage play a significant role in oil changer intervals. For example with my VW Golf TDi the oil change interval was nominally 10K miles. But the dealer service department had a notice posted from VW declaring the area (this was Merriam KS) a severe usage region: Temperature, humidity, and traffic congestion with lots of idling; and the 10K mile oil change interval was reduced to 5K miles.

For me I am comfortable changing oil while it still has some life left. I am not in favor of using oil analysis and waiting for wear metal PPM number to show an uptick before I change the oil. The oil is the sacrificial item in the engine and engine oil combination and one can go through a lot of oil before he comes close to reaching the cost of a replacement engine.

For example, my 2002 Boxster went 317K miles with no engine troubles with 5K mile oil changes. At on average say $175 per oil change that was 63 oil changes and the total came to around $11,000. A new engine for the car listed at $26K with no core and $19K with a core. Labor to R&R the engine would have run maybe $2K plus the "while you are there" things... Oh my.

Anyhow, my JCW gets its oil changed every 5K miles as does my Hellcat. (Dodge says to change the oil every 6K miles or 6 months, but I do this every 5K miles (or 6 months when I don't put 5K miles on the car in 6 months time, which happened the last oil change. From last Dec. to June this year the car only accumulated 3K miles.)

Odometer setting:
XX5000
or
XX0000
Change the oil easy peasy
Good time to rotate the tires too.

Thanks guys. Considering the traffic and heat in SoCal, i'll be sticking to 5k!