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Should I extend my OCI? #4593111
12/03/17 03:33 PM
12/03/17 03:33 PM
Joined: Jul 2017
Posts: 183
Venezuela, South America
Emanuel Offline OP
Emanuel  Offline OP
Joined: Jul 2017
Posts: 183
Venezuela, South America
I have a 99 Fiat Uno with only 43k miles on the engine, the Owners manual recommends a 6k miles OCI using a API SH 15w40 oil, but where I live we are used to 3k OCI. Im currently using a CI4/SL rated 15w40 and I would like to extend my OCI because I think that Im using a way better oil than the Owners Manual recommended, my only concerns are:

- The car is carbureted, I dont know if that means I should change my oil more often
- Our fuel has high sulphur in it, I think it has something like 600 PPM of sulphur

Should I extend my oil change interval?

Re: Should I extend my OCI? [Re: Emanuel] #4593115
12/03/17 03:36 PM
12/03/17 03:36 PM
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
I don't see why you cannot extend it to at least 5000 Miles per OCI.


2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: Should I extend my OCI? [Re: Emanuel] #4593119
12/03/17 03:46 PM
12/03/17 03:46 PM
Joined: Oct 2009
Posts: 3,222
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline
Joined: Oct 2009
Posts: 3,222
Wet side WA
What basis are you using for extending it do you have any UOA?


2004 Corolla 124805
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74277
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 74705 4-22-18
Re: Should I extend my OCI? [Re: JohnnyJohnson] #4593122
12/03/17 03:49 PM
12/03/17 03:49 PM
Joined: Jul 2017
Posts: 183
Venezuela, South America
Emanuel Offline OP
Emanuel  Offline OP
Joined: Jul 2017
Posts: 183
Venezuela, South America
Originally Posted By: JohnnyJohnson
What basis are you using for extending it do you have any UOA?


No, I dont have UOA data. But the cheapest conventional oil cost 3.4$ a qt, so I would like to stop wasting oil if it can be used for longer safely.

Re: Should I extend my OCI? [Re: Emanuel] #4593132
12/03/17 03:56 PM
12/03/17 03:56 PM
Joined: Oct 2009
Posts: 3,222
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline
Joined: Oct 2009
Posts: 3,222
Wet side WA
Originally Posted By: Emanuel
Originally Posted By: JohnnyJohnson
What basis are you using for extending it do you have any UOA?


No, I dont have UOA data. But the cheapest conventional oil cost 3.4$ a qt, so I would like to stop wasting oil if it can be used for longer safely.


Well Emanuel is this the car your slid in under your Toyota's fill cap?


2004 Corolla 124805
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74277
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 74705 4-22-18
Re: Should I extend my OCI? [Re: JohnnyJohnson] #4593142
12/03/17 04:07 PM
12/03/17 04:07 PM
Joined: Jul 2017
Posts: 183
Venezuela, South America
Emanuel Offline OP
Emanuel  Offline OP
Joined: Jul 2017
Posts: 183
Venezuela, South America
Originally Posted By: JohnnyJohnson
Originally Posted By: Emanuel
Originally Posted By: JohnnyJohnson
What basis are you using for extending it do you have any UOA?


No, I dont have UOA data. But the cheapest conventional oil cost 3.4$ a qt, so I would like to stop wasting oil if it can be used for longer safely.


Well Emanuel is this the car your slid in under your Toyota's fill cap?


No I still have the Corolla, it is 286k miles now and its only burning 1 qt per 1600 miles, I was calculating the oil consumption wrongly

Re: Should I extend my OCI? [Re: Emanuel] #4593145
12/03/17 04:12 PM
12/03/17 04:12 PM
Joined: Sep 2005
Posts: 5,679
MIchigan
Warstud Online content
Warstud  Online Content
Joined: Sep 2005
Posts: 5,679
MIchigan
Depends on oil type: Dino or Synthetic

Also Depends on how it's driven: Mostly highway or mostly City (stop & go). Driven on weekends?

Re: Should I extend my OCI? [Re: Warstud] #4593148
12/03/17 04:18 PM
12/03/17 04:18 PM
Joined: Jul 2017
Posts: 183
Venezuela, South America
Emanuel Offline OP
Emanuel  Offline OP
Joined: Jul 2017
Posts: 183
Venezuela, South America
Originally Posted By: Warstud
Depends on oil type: Dino or Synthetic

Also Depends on how it's driven: Mostly highway or mostly City (stop & go). Driven on weekends?


Its using conventional oil, and 80% highway, 20% city driving

Re: Should I extend my OCI? [Re: Emanuel] #4593178
12/03/17 05:04 PM
12/03/17 05:04 PM
Joined: Oct 2017
Posts: 636
Georgia
MParr Offline
MParr  Offline
Joined: Oct 2017
Posts: 636
Georgia
Please tell us if your Fiat is gasoline or diesel. You say it has a carburetor but, the CI-4 oil is diesel specked oil.


2013 KIA Optima EX 2.4L. Now: QSUD 5W30 & STP S2808ML
2017 Ford Escape SE 2.0T Now: Pennzoil Platinum 5W30 & Motorcraft 910s
Re: Should I extend my OCI? [Re: Emanuel] #4593190
12/03/17 05:20 PM
12/03/17 05:20 PM
Joined: Sep 2015
Posts: 5,858
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,858
Kalifornia Kollective
It's gas and he's using HDEO "fleet" oil. Good call smile

I'd try to get one UOA because we do not know how rich that carb is running ... If there is no fuel dilution, you should go the Fiat recommended interval. You'll be fine.

If there is fuel dilution, you should back down accordingly ...

Last edited by BrocLuno; 12/03/17 05:21 PM.

Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Should I extend my OCI? [Re: MParr] #4593192
12/03/17 05:21 PM
12/03/17 05:21 PM
Joined: Jul 2017
Posts: 183
Venezuela, South America
Emanuel Offline OP
Emanuel  Offline OP
Joined: Jul 2017
Posts: 183
Venezuela, South America
It is a gasoline powered engine but oil is for mixed fleets

Re: Should I extend my OCI? [Re: JC1] #4593361
12/03/17 07:56 PM
12/03/17 07:56 PM
Joined: Sep 2009
Posts: 16,012
OH
fdcg27 Offline
fdcg27  Offline
Joined: Sep 2009
Posts: 16,012
OH
Originally Posted By: JC1
I don't see why you cannot extend it to at least 5000 Miles per OCI.


I'd agree with this.
It's not as though five or six thousand miles would be all that long on a HDEO.


17 Forester 12K MSS 0W-20
12 Accord LX 92K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i
Re: Should I extend my OCI? [Re: Emanuel] #4593383
12/03/17 08:13 PM
12/03/17 08:13 PM
Joined: Oct 2010
Posts: 5,285
Florida
Artem Offline
Artem  Offline
Joined: Oct 2010
Posts: 5,285
Florida
With that much highway driving, I think 5k would definitely be a safe bet.


2014 Mazda 3 Hatch 2.0L & 6spd - Idemitsu 0w20 Synthetic @ $0.75 a quart. (thanks Advance Auto Parts for the awesome deal)
Re: Should I extend my OCI? [Re: Emanuel] #4593496
12/03/17 10:07 PM
12/03/17 10:07 PM
Joined: Sep 2015
Posts: 2,260
Malaysia
zeng Offline
zeng  Offline
Joined: Sep 2015
Posts: 2,260
Malaysia
Originally Posted By: Emanuel
I have a 99 Fiat Uno with only 43k miles on the engine, the Owners manual recommends a 6k miles OCI using a API SH 15w40 oil, but where I live we are used to 3k OCI. Im currently using a CI4/SL rated 15w40 and I would like to extend my OCI because I think that Im using a way better oil than the Owners Manual recommended, my only concerns are:

- The car is carbureted, I dont know if that means I should change my oil more often
- Our fuel has high sulphur in it, I think it has something like 600 PPM of sulphur

Should I extend my oil change interval?

Yes,I would think so preferably with free and easy Blotter Spot Test/ pricy UOA.

My carburreted Mitsubishi 4G15 oil used to be replaced at 3000 miles OCI in early 1990's.
I'd used 15W40 CI4 SL HDEO for several years prior , increasing OCI to 6000 miles. Blotter Spot test shows no problem.

With blend 10W40 A3B4 SL on offer price available , I'd since switched from CI4 SL and intend to maintain 6000 miles with Blotter, which I don't foresee any issue.

Btw, my gasoline is Euro II 500 ppm.

Last edited by zeng; 12/03/17 10:10 PM.

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