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OCI For track car? #4836238
08/10/18 09:36 AM
08/10/18 09:36 AM
Joined: Jan 2014
Posts: 484
Australia
Spetz Offline OP
Spetz  Offline OP

Joined: Jan 2014
Posts: 484
Australia
Hi guys,

I have a car I use only for the race track (circuit).
The engine is a 6A12 from a Mitsubishi FTO.

I run 5w40 Shell Helix Ultra in it.

It has been close to 1 year since it's had the current oil in it.
In this year it did about 300 miles (most of which close to redline) and has been warmed up maybe 20-30 times.

What should my OCI be?
Annual?
Should I change oil filter too?


2003 Mitsubishi Diamante 6G74 3.5L. 5 Speed auto. 160,000 miles. Shell Helix Ultra 5W40 at 6k OCI
Re: OCI For track car? [Re: Spetz] #4836255
08/10/18 09:52 AM
08/10/18 09:52 AM
Joined: Apr 2010
Posts: 3,552
Atlanta,GA
BMWTurboDzl Offline
BMWTurboDzl  Offline

Joined: Apr 2010
Posts: 3,552
Atlanta,GA
UOA's would help you decide the proper interval.

If the car is used for racing only, I would use a race oil since the add pack would be optimized for those conditions.


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: OCI For track car? [Re: Spetz] #4836266
08/10/18 09:59 AM
08/10/18 09:59 AM
Joined: Jul 2017
Posts: 542
Texas (south)
FermeLaPorte Offline
FermeLaPorte  Offline

Joined: Jul 2017
Posts: 542
Texas (south)
What does Mitsu recommend on those engines when racing? I would look for that and maybe start planning it out.


Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.
Re: OCI For track car? [Re: Spetz] #4836279
08/10/18 10:19 AM
08/10/18 10:19 AM
Joined: Mar 2013
Posts: 5,680
The Midwest
skyactiv Offline
skyactiv  Offline

Joined: Mar 2013
Posts: 5,680
The Midwest
Subaru says something crazy for those auto crossing. New oil for the event and change it afterwards.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual

Re: OCI For track car? [Re: Spetz] #4836323
08/10/18 11:18 AM
08/10/18 11:18 AM
Joined: Oct 2010
Posts: 7,342
Michigan
A_Harman Offline
A_Harman  Offline

Joined: Oct 2010
Posts: 7,342
Michigan
Can you tell us more about the engine and environment?
Turbocharged or naturally aspirated?
Approx HP?
Maximum revs on track?
Does it have an oil cooler? Max oil temperature and where measured?
Is there an Accusump (pressure accumulator) in the oil system?

When I was running my Camaro on track, I just depended on the oil monitor to tell me when to change, and the engine survived just fine on various high quality synthetic 5w30's for 16 years.

If you are just doing track work with the engine, a series of UOA's over event weekends would eventually give you a picture of viscosity stability, fuel dilution, oxidation, and wear metal trends. Just starting out, I recommend an oil sample after each event, and after 3 such events trends can begin to be established.


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: OCI For track car? [Re: Spetz] #4836331
08/10/18 11:24 AM
08/10/18 11:24 AM
Joined: Sep 2015
Posts: 6,205
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline

Joined: Sep 2015
Posts: 6,205
Kalifornia Kollective
Yeah, it's all about the UOA's. Understand that you hate the expense and leaving the oil in, but it's the best way smile


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: OCI For track car? [Re: BrocLuno] #4836449
08/10/18 01:38 PM
08/10/18 01:38 PM
Joined: Oct 2014
Posts: 13,807
Idaho
CT8 Offline
CT8  Offline

Joined: Oct 2014
Posts: 13,807
Idaho
Originally Posted By: BrocLuno
Yeah, it's all about the UOA's. Understand that you hate the expense and leaving the oil in, but it's the best way smile
+1 if you want to know !


2015 F150 2.7
2018 F350 6.2
Re: OCI For track car? [Re: Spetz] #4836692
08/10/18 06:54 PM
08/10/18 06:54 PM
Joined: Jan 2014
Posts: 484
Australia
Spetz Offline OP
Spetz  Offline OP

Joined: Jan 2014
Posts: 484
Australia
Thanks everyone.

I do a time attack against myself, so not competitive racing.
I have a temp gauge on a oil filter sandwich plate and so far max temps were 110c (230f).
The engine is mostly standard (NA) but has some bolts ons and ported heads that give about a 15% increase (230ish hp at the crank).
Cutout rpm are 8,200 but about 8,000rpm is what it sees on the track.
I do warm up and cool down laps.
15-20 min track time per hour and i generally do slow laps in that time to give the car a break


I'll look into a UOA


2003 Mitsubishi Diamante 6G74 3.5L. 5 Speed auto. 160,000 miles. Shell Helix Ultra 5W40 at 6k OCI
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