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#4593111 - 12/03/17 02:33 PM Should I extend my OCI?
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: 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?

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#4593115 - 12/03/17 02:36 PM Re: Should I extend my OCI? [Re: Emanuel]
JC1 Offline


Registered: 11/29/08
Posts: 3019
Loc: 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/Wix Filter
1997 Honda Civic CX 5w-30 PPPP/Mahle Filter

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#4593119 - 12/03/17 02:46 PM Re: Should I extend my OCI? [Re: Emanuel]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2773
Loc: Wet side WA
What basis are you using for extending it do you have any UOA?
_________________________
2004 Toyota Corolla 121808
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4593122 - 12/03/17 02:49 PM Re: Should I extend my OCI? [Re: JohnnyJohnson]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: 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.

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#4593132 - 12/03/17 02:56 PM Re: Should I extend my OCI? [Re: Emanuel]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2773
Loc: 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 Toyota Corolla 121808
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4593142 - 12/03/17 03:07 PM Re: Should I extend my OCI? [Re: JohnnyJohnson]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: 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

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#4593145 - 12/03/17 03:12 PM Re: Should I extend my OCI? [Re: Emanuel]
Warstud Online   content


Registered: 09/02/05
Posts: 5414
Loc: 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?

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#4593148 - 12/03/17 03:18 PM Re: Should I extend my OCI? [Re: Warstud]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: 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

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#4593178 - 12/03/17 04:04 PM Re: Should I extend my OCI? [Re: Emanuel]
MParr Offline


Registered: 10/28/17
Posts: 515
Loc: 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: Castrol Magnatec GTX 5W30 synthetic & STP S2808ML
2017 Ford Escape SE 2.0T Now: Pennzoil Platinum 5W30 & Motorcraft 910s

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#4593190 - 12/03/17 04:20 PM Re: Should I extend my OCI? [Re: Emanuel]
BrocLuno Offline


Registered: 09/06/15
Posts: 5528
Loc: 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 ...


Edited by BrocLuno (12/03/17 04:21 PM)
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4593192 - 12/03/17 04:21 PM Re: Should I extend my OCI? [Re: MParr]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
It is a gasoline powered engine but oil is for mixed fleets

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#4593361 - 12/03/17 06:56 PM Re: Should I extend my OCI? [Re: JC1]
fdcg27 Offline


Registered: 09/25/09
Posts: 15729
Loc: 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 86K 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

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#4593383 - 12/03/17 07:13 PM Re: Should I extend my OCI? [Re: Emanuel]
Artem Offline


Registered: 10/30/10
Posts: 5119
Loc: 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.

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#4593496 - 12/03/17 09:07 PM Re: Should I extend my OCI? [Re: Emanuel]
zeng Offline


Registered: 09/01/15
Posts: 2189
Loc: 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.


Edited by zeng (12/03/17 09:10 PM)

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