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Oil Consumption


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16 replies to this topic

#1
MiCRO

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How much oil does your Mi16's consume?

Is it possible to reduce consumption a bit by switching from total quartz 7000 10w40 oil to total quartz 9000 5w40?

#2
welshpug

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not a lot at all.

#3
MiCRO

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QUOTE (WELSHPUG @ Nov 22 2011, 01:19 AM) <{POST_SNAPBACK}>
not a lot at all.



What oil do you use? Do you think I could achieve lower oil consumption by changing the type of oil?

#4
welshpug

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standard spec total quartz 7000 iirc.

I doubt it, more likely to be due to wear in the engine, how much are you using?

#5
MiCRO

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QUOTE (WELSHPUG @ Nov 22 2011, 01:18 PM) <{POST_SNAPBACK}>
standard spec total quartz 7000 iirc.

I doubt it, more likely to be due to wear in the engine, how much are you using?


1liter per 1000km, but the car's performance are very good, and it doesn't smoke when I pull the dipstick out. huh.gif

#6
B1ack_Mi16

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QUOTE (MiCRO @ Nov 22 2011, 01:29 PM) <{POST_SNAPBACK}>
QUOTE (WELSHPUG @ Nov 22 2011, 01:18 PM) <{POST_SNAPBACK}>
standard spec total quartz 7000 iirc.

I doubt it, more likely to be due to wear in the engine, how much are you using?


1liter per 1000km, but the car's performance are very good, and it doesn't smoke when I pull the dipstick out. huh.gif


It sounds like my old Mi16 when I bought it. I had to fill 1 litre each week, so probably a bit more than yours.
The car had done 250000km when I got it.

After I changed the valve stem seals it would use 1 litre on about 10000-15000km somewhere so never again had to refill before next oil change.



#7
MiCRO

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QUOTE (B1ack_Mi16 @ Nov 22 2011, 02:07 PM) <{POST_SNAPBACK}>
It sounds like my old Mi16 when I bought it. I had to fill 1 litre each week, so probably a bit more than yours.
The car had done 250000km when I got it.

After I changed the valve stem seals it would use 1 litre on about 10000-15000km somewhere so never again had to refill before next oil change.


Mine's got 205 000km on the clock (probably it's more since I'm not the first owner)

That's just what my mechanic told me, valve stem seals laugh.gif

So there's no chance I could at least lower the consumption with higher viscosity 5w40 oil?


#8
KRISKARRERA

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How's that going to help though? The oil will just flow slightly better from cold.

#9
cammmy

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My BX16v has about 300,000km on the clock and oil use is sweet as. It's had the valve stem seals replaced with teflon units. Only other things that's been done is the big-ends which I changed because I had the sump off anyway.

Thicker oil may help, especially if with a few km's on the motor. Maybe go for a 10w-50 or 15w-50 which is what I run.

#10
welshpug

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mine is on 100k miles and doesn't use any oil between services, though haven't used it in 2 years sad.gif

#11
MiCRO

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QUOTE (KRISKARRERA @ Nov 22 2011, 09:33 PM) <{POST_SNAPBACK}>
How's that going to help though? The oil will just flow slightly better from cold.


Because quartz 7000 10w40 has viscosity index of 150, and quartz 9000 5w40 - 170, so I thought it would be a bit better


#12
cammmy

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Try a good quality 15w-50 bud and see if it helps.

Another question, you're not using fully synth are you?

#13
MiCRO

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QUOTE (cammmy @ Nov 23 2011, 09:37 PM) <{POST_SNAPBACK}>
Try a good quality 15w-50 bud and see if it helps.

Another question, you're not using fully synth are you?


no, semi-synth why?

#14
cammmy

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I believe in older/higher milage engines, fully synth oil makes it into the cylinder much more easily which causes higher consumption due to looser tolerances. It's designed for more modern engines with tighter tolerances

Also:

QUOTE
The problem that most people encounter when switching a high mileage car to synthetics is due to the detergents in the synthetic oil. The conventional oil "gunk" accumulates around the gaskets and other places, often times preventing leaks. The synthetic oil begins to remove this "gunk" and things like oil pan gaskets, main seals, and valve cover gaskets beging oozing oil.

Another thing to consider is based on the year of your vehicle and the type of cam/lifter configuration. A roller cam system works fine with synthetic oil. However, with the removal of zinc from engine oil over the last few years, many flat tappet cams have been unhappy with this change. My personal opinion is that flat tappet cam engines need a zinc additive even after break in. Most synthetic oils don't contain enough zinc and arent additive friendly.


I've never run a fully-synth though so can't comment from experience

#15
MiCRO

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s*it I just bought fully synth 5w40 yesterday laugh.gif

Well, I'll give it a shot, I'm selling the car anyway so nothing to loose really.

And I got a friend who used full synth on a high mile Mi16, and got no problems, no oil consumption, so I'm hoping eveything will be ok on mine too. ohmy.gif

#16
welshpug

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synth/semi shouldn't do one bit of difference, its the grade that matters.

#17
B1ack_Mi16

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QUOTE (WELSHPUG @ Nov 28 2011, 04:44 PM) <{POST_SNAPBACK}>
synth/semi shouldn't do one bit of difference, its the grade that matters.


second that...