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1985 Mazda Rx-7 gsl-se #4479247
08/04/17 06:11 PM
08/04/17 06:11 PM
Joined: Sep 2010
Posts: 377
SC
Clubber_Lang Offline OP
Clubber_Lang  Offline OP
Joined: Sep 2010
Posts: 377
SC
I have an interesting engine and am seeking an oil recommendation.

Its a 13b Rotary Engine, stock in a 1985 Mazda Rx-7 gsl-se I recently acquired. It has 68,000 original miles and is (to my knowledge) used to a steady diet of conventional 10w-30. The car runs great, doesn't smoke and has no leaks.

Opinions on Oil are welcome.


political signature removed
Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479269
08/04/17 06:36 PM
08/04/17 06:36 PM
Joined: Oct 2010
Posts: 7,097
Michigan
A_Harman Offline
A_Harman  Offline
Joined: Oct 2010
Posts: 7,097
Michigan
That's a pretty rare find. 13B's were only installed in the GSL-SE, and finding one with such low miles that hasn't been mechanically molested is great. Since that engine was built in the era of 1200+ Phosphorous levels, I think something like Valvoline VR1 10w30 conventional would be good. Apex seals are always the worry in Wankel durability, and zddp is for sliding wear resistance.


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479274
08/04/17 06:38 PM
08/04/17 06:38 PM
Joined: Jul 2016
Posts: 1,682
Jacksonville, FL
FlyNavyP3 Offline
FlyNavyP3  Offline
Joined: Jul 2016
Posts: 1,682
Jacksonville, FL
Mazda has (to the best of my knowledge) always recommended that rotary engines use conventional oil to prevent deposit formation in the engine ports. Not sure if this is warranted or not but lots of these lived their lives on conventional oil no reason that you couldn't continue running a conventional 10w30. I like Valvoline but that's a personal preference.


Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander
Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479279
08/04/17 06:47 PM
08/04/17 06:47 PM
Joined: Dec 2006
Posts: 19,113
Dallas,Tx USA
aquariuscsm Online content
aquariuscsm  Online Content
Joined: Dec 2006
Posts: 19,113
Dallas,Tx USA
Pictures please! slobber


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 10W30

Re: 1985 Mazda Rx-7 gsl-se [Re: aquariuscsm] #4479285
08/04/17 06:51 PM
08/04/17 06:51 PM
Joined: Jan 2008
Posts: 10,958
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,958
OH
Locally I saw an 88 with a V8 conversion for sale that I thought looked interesting.







https://cleveland.craigslist.org/cto/d/1988-mazda-rx7-8/6193725084.html

Re: 1985 Mazda Rx-7 gsl-se [Re: aquariuscsm] #4479324
08/04/17 07:29 PM
08/04/17 07:29 PM
Joined: Sep 2010
Posts: 377
SC
Clubber_Lang Offline OP
Clubber_Lang  Offline OP
Joined: Sep 2010
Posts: 377
SC




political signature removed
Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479337
08/04/17 07:37 PM
08/04/17 07:37 PM
Joined: Sep 2010
Posts: 377
SC
Clubber_Lang Offline OP
Clubber_Lang  Offline OP
Joined: Sep 2010
Posts: 377
SC
The car certainly is not perfect. But it runs great and is in very clean "driver" condition.


political signature removed
Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479359
08/04/17 08:03 PM
08/04/17 08:03 PM
Joined: Jul 2017
Posts: 542
Texas (south)
FermeLaPorte Offline
FermeLaPorte  Offline
Joined: Jul 2017
Posts: 542
Texas (south)
10w30 PUP


Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.
Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479366
08/04/17 08:10 PM
08/04/17 08:10 PM
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,803
Crawfordville FL
My brother had one of those for a time. The secondaries would stick open and make life very interesting


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30
Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479375
08/04/17 08:22 PM
08/04/17 08:22 PM
Joined: Jul 2016
Posts: 682
il usa
merconvvv Offline
merconvvv  Offline
Joined: Jul 2016
Posts: 682
il usa
Nice car.

When u crank it make sure it starts. Otherwise u flood the engine.
It will be a miracle if it starts on the second crank attempt.
Nothing serious just have to pay a little attention while firing up.

Give pp 10w30 a try.

Heard a lot of rx7 owners also like castrol gtx.


1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0
Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479376
08/04/17 08:22 PM
08/04/17 08:22 PM
Joined: Mar 2008
Posts: 5,963
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,963
South Florida
You do not run synthetic in these engines. Well you can, but you wont like the results. Mazda does not want you to run synthetics in these engines. Plus the engine is 32 years old and has likely run conventional oil its entire life....

I'd run a stout non-synthetic 10W30 diesel oil. Rotella T or similar. Conventional VR1 would also be a good choice.


17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
10 Acura TSX 2.4 Maxlife Syn 5W30
06 GMC Sierra Nextgen 10W30


Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479427
08/04/17 09:30 PM
08/04/17 09:30 PM
Joined: Sep 2015
Posts: 6,075
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 6,075
Kalifornia Kollective
I know nothing of these engines. Always thought they were interesting, but never owned one ... OK, you know about my ignorance here, but what about a Grp III syn-blend like Maxlife? Wasn't around when this was new. So maybe it's OK - or not ...


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: 1985 Mazda Rx-7 gsl-se [Re: bubbatime] #4479434
08/04/17 09:44 PM
08/04/17 09:44 PM
Joined: Dec 2011
Posts: 5,098
North Carolina
rooflessVW Online content
rooflessVW  Online Content
Joined: Dec 2011
Posts: 5,098
North Carolina
Originally Posted By: bubbatime
I'd run a stout non-synthetic 10W30 diesel oil. Rotella T or similar.

Me too.


"Zed's dead baby, Zed's dead."
Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479444
08/04/17 10:16 PM
08/04/17 10:16 PM
Joined: Dec 2006
Posts: 19,113
Dallas,Tx USA
aquariuscsm Online content
aquariuscsm  Online Content
Joined: Dec 2006
Posts: 19,113
Dallas,Tx USA
Originally Posted By: Clubber_Lang





Good lord that's BEAUTIFUL!!


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 10W30

Re: 1985 Mazda Rx-7 gsl-se [Re: Clubber_Lang] #4479445
08/04/17 10:17 PM
08/04/17 10:17 PM
Joined: Dec 2006
Posts: 19,113
Dallas,Tx USA
aquariuscsm Online content
aquariuscsm  Online Content
Joined: Dec 2006
Posts: 19,113
Dallas,Tx USA
I'd go with pyb or qs 10W30.


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Quaker State Ultimate Durability 10W30

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