It seems too often to me, especially with a partial synthetic oil. But it's what's called for in the manual. I know, it's a nice car, take care of it, etc. But I know the oil will last longer than 3750.

 

If you are concerned then do an oil analysis between change intervals. I change mine every 3750, it's only about $20 so why not.

 

i change mine every 4000-4200 or so. IF you rev the engine a lot, I feel it wears out the oil faster. My oil, castrol syntec 5w-30, looks pretty dark after 4000 miles.

 

0W30 German Castrol for me and I pretty much change my oil at around 3500 to 3800 Miles.

 

Been changing my Mobil 1 at 5K intervals. Next up I have 6 changes of 0W30 German Castrol same as you. Guess I need to change it around 4K then, right?

 

for those with the 0w-30, why 0w? just asking

 

Red Line Synthetic 10W/30 and K&N filter every 90 days or 3500 miles which ever comes first, my cost $60 but it's worth knowing I'm protecting the internals of my motor....all about respect!
Gary

 

Changing oil so soon is a waste of money and only adds to our dependancy for foreign oil. Change you oil at a 5K MINIMUM. I've had cars go to nearly 200K miles with 10,000 mile non-synthetic oil changes and they never gave me problems. Frequent oil changing is a myth.

 

sure, but just cause you have wont mean i will or anyone else


just my .02

 

This is my point with the thread. I've owned several cars over the years including some nice rides, but most manuals don't call for an oil change before 5k miles and that's regular oil. Seems like a partial synthetic could go longer than 3750. I guess while the car is under warranty I'll do what they ask. After that I'm on my own.
And I'm a big believer in changing oil when needed. My first car's motor seized up due to the previous owner's lack of care in that area.

 

I change every 3000 w/ full synthetic. Total cost about $50 each time but because oil is one of the most important fluids in the car, I don't mind any overkill.

 

I've done it with 3 different cars with 0 issues, all have gone over 150,000 miles. Heck, my dads 86 camaro siezed the engine after 80,000 miles because he NEVER changed the oil...LOL...it lasted 80K though. While I'm not exactly saying everyone should do 10K mile oil changes on the cheapest stuff you can get, anything under 5000 miles is a waste. This info isn't exactly new. Some car manufacturers even go to 15K miles with no oil change.

 

I change my oil every 5,000 miles. when i had a BMW it was recommended every 10,000-15,000 they use Castrol TWS, anybody ever use Castrol TWS in a G35

 

No.. you don't have to change it that early if you don't want to.. certainly not earlier than with Mobil-1. German Castrol would last longer than Mobil 1 given the same driving conditions because it's a higher quality true synthetic whereas Mobil-1 is not a true synthetic, even though it is labeled as such.

I just change mine at around that mileage because I don't drive my car that often, so the oil sits in it for a long time and only gets changed about 2 to 3 times per year which is generally in the 3500 mile range per interval for me. I'm an oil **** anyways and would rather err far on the side of caution.

If you drive your G35 on a more consistent basis with lots of higher gear driving, you can definitely go longer than that... but the only true indicator is to get a used oil analysis done.

I will tell you that my motor seems smoother at higher RPM's with the German Castrol though than it did with Mobil-1. I ran Mobil-1 for my first 3 oil changes in this car before switching over to GC. Don't expect to notice a huge difference, since it is only oil... but the GC is quite a bit thicker than the Mobil-1 despite the similar viscosity rating. When you pour the GC for the first time, I think you'll see what I'm talking about.

 

so what does it say in the manuals for G35s for oil changes?