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#4331663 - 02/17/17 05:39 AM OCI for Mazda CX-9 3.7
urman Offline

Registered: 02/16/17
Posts: 1
Loc: Kiev, Ukraine
Hi all from Ukraine!

I have two Mazda's, made for USA Market. Also I buy American oil via Amazon, so I have stock of oils like Castrol EDGE Extended Perfomance and now waiting Amsoil SS 5w20. I have 3.7 engine in my CX-9 (2008)

So,can you recomend me the right OCI for this engine?
I use LPG fuel for 80% of mileage.
Total mileage is 56k miles.
I drive about 50 miles every day, 50% highway.

I ordered the Mobile 1 EP and FRAM Ultra oil filters to try them. Now I use OEM.

Thanks for your advices!

P.S. I made few years ago VOA for CX-7 in 5000km (3125ml) OCI at Addinol MV0537 5w30. TBN was 4.09 and perfect wear results. May be it can be interesting for someone:
Mazda CX-9 \ Mobil 1 EP 5w30\ Mobil 3309 ATF \ Redline ShockProof

Mazda CX-7 \ Shell Helix Ultra 5w30\ Ravenol T-IV\ Redline ShockProof

#4331850 - 02/17/17 10:00 AM Re: OCI for Mazda CX-9 3.7 [Re: urman]
bigt61 Offline

Registered: 02/12/13
Posts: 3114
Loc: Virginia
If it's a USA Mazda, I'd just follow the OLM and add a few thousand miles for your adjusted OCI. If you're sticking to full synthetics and the high LPG use, that should be easy. You can probably double stint the oil filter as well. LPG burns pretty clean.
92 Suburban 2500 7.4L 58k M1_0w40 5yr OCI
99 Olds Aurora 4.0L 91K M1_5w30 5yr OCI
13 Dodge Dart 2.0L 30k PP 0w20 OLM OCI
70 Camaro 5.7L 59k

#4331872 - 02/17/17 10:25 AM Re: OCI for Mazda CX-9 3.7 [Re: urman]
Linctex Offline

Registered: 12/31/16
Posts: 4741
Loc: Waco, TX
LP gas burns VERY clean.

A good synthetic will probably last for 25,000-30,000km easily, and a good oil filter will last 50,000-60,000 km
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

#4332201 - 02/17/17 04:22 PM Re: OCI for Mazda CX-9 3.7 [Re: urman]
2oldtommy Offline

Registered: 10/29/06
Posts: 871
Loc: Ohio
urman, Welcome to BITOG! You have a great car IMO. The fact that you are using LPG as fuel should allow you to extend the OCI. The 3.7 L engine is a Ford design, and has proven to be very reliable. Does your CX9 have an oil life monitor? If it does, I would follow that. FWIW

Old tommy

#4333012 - 02/18/17 02:04 PM Re: OCI for Mazda CX-9 3.7 [Re: urman]
Bobby_x Offline

Registered: 12/04/16
Posts: 27
Loc: Poland
Pls keep in mind that according to regulations LPG here can have up to 50 mg/kg sulfur so high tbn is a must
07 Yaris 1.3 vvti mix of 5w30 + Alco sp-991 filter