Thread: How much oil

Originally Posted by mowog

One of the new diesel Mazda's were having issues with oil overfilling because oil dilution caused by the DPF. I had heard of other cars with similar issues. Seems it is mostly caused by short trips. I don't know why oil dilution occurs I just know it is factor on some cars.

OK mate, thanks. I'll have to look further into it.

I thought from your other post that for once somebody was going to say something good about a DPF.....LOL!!!!

Ok I will say something nice about a DPF.....

It's nice that I sold my Diesel Mini fitted with a DPF and brought a JCW Clubman with no DPF.

Originally Posted by mowog

Ok I will say something nice about a DPF.....

It's nice that I sold my Diesel Mini fitted with a DPF and brought a JCW Clubman with no DPF.

Excellent!!!

Originally Posted by mowog

I was getting the oil done every 6 months and there were no issues. Last 6 month service the oil wasn't changed. As the D4 had only done a few 1000 klm since the last service.

No white smoke that I can see.

Have you been doing that yourself or requesting it? The normal service intervals dictate that an oil and filter is changed every 26k's, not 13

Originally Posted by LRTech23

Have you been doing that yourself or requesting it? The normal service intervals dictate that an oil and filter is changed every 26k's, not 13

My Dealer gives me the choice. I choose to do it every 13k.

Originally Posted by LRTech23

Have you been doing that yourself or requesting it? The normal service intervals dictate that an oil and filter is changed every 26k's, not 13

Because my D4 Tows a lot I was getting the oil done every 6 months. Last service it hadn't done many klm since it's last 12 month service. And it hadn't done much towing this year.

OK, just did a quick bit of Googling. Don't shoot the messenger, this is my quick take.

DPF equipped engines have a late cycle injection of more fuel when conducting a regen. This I believe increases the exhaust gas temp, thus burning off the stuff collected in the DPF. It appears common in a lot of brands that some of the extra fuel does not burn and gets forced past the the rings/pistons thus diluting the engine oil.

It appears that other brands have a system monitor acting on either increased oil level or a predicted dilution algorithm. Post service resets or calibrations are required. Usual signs, DPF light on and then going off after a regen is normal, light staying on means a possible dilution issue and a check is required.

What does a D4 have or do? Can the oil indicator over-read, to display an oil level concern or does it stop at full. I think there is an overfill warning but is there something specific to DPF fitted vehicles?

I don't know the answer to any of those questions....anybody?, anybody?

Cheers,

Kev.

There is an overfill warning, I've seen it once. I think the threshold is 500ml over full.