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Old 01-18-2018, 08:52 AM   #51
Samurai Jack
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Quote:
Originally Posted by rtv900 View Post
ok, so on a rotary you need a redline a day to keep the carbon away.
So I'm assuming you think a piston engine needs a redline on a weekly basis right?
Clearly, you haven't been paying attention. He said a daily redline, or at least is alluding to a daily redline.

Quote:
Originally Posted by jasonWRX
My WRX does not burn noticeable amount because I pretty much red line her once a day once it's fully warmed up.
And here is that "Italian Tune-Up" he keeps referring to: https://en.wikipedia.org/wiki/Italian_tuneup

He isn't even using it in the correct context.
Too much reading and lack of comprehension vs. actual knowledge / hands-on experience on his part.
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Last edited by Samurai Jack; 01-18-2018 at 08:57 AM.
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Old 01-18-2018, 09:46 AM   #52
jasonwrx86
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Originally Posted by tramp View Post
Empirical and anecdotal are very different things. And you supply the latter. Youtube,Google???? Try beginning a reply with "SAE paper #---- states......" or "my experience tuning."

To it's full horsepower rating?????? What does that even mean?

BTW soot and carbon are not the same. One can contain the other and as stated earlier the other is an element.

Prove the italian tune up doesn't work...........hmmmmm........would an EFI motorcycle with about 10K miles suit you? I'll be tuning a 2016 Harley early next week and can perform a loaded dyno "Italian Tune Up" w/before and after hp/torque readings same vehicle same day same dyno.
Has the bike been babied for a while? Never hit above half of its redline over 3000 miles?
Soot is mostly carbon. Any hydrocarbons can turn into carbon after being burned without enough oxygen.
To maxium horsepower meaning there will the max amount of exhaust flow to loosen and remove any kind of carbon built up.
Maybe I was not making myself clear. I was referring to OP's oil burning engine maybe try some italian tune-up to see if oil consumption changes.
Here is a paper about how piston ring sticking, varnishing, and clogging. It does mention high heat can remove chemicals from stuck rings.
http://papers.sae.org/390014/

Last edited by jasonwrx86; 01-18-2018 at 12:44 PM.
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Old 01-18-2018, 11:00 AM   #53
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Ok, so I'm not interested in the gang bang going on here. Maybe I'll delete it all sometime.

To the OP: Look to the warranty and maintenance booklet and find the lines under the service intervals for "severe use" mileage for oil changes. They list 3 months, 3000 miles. While that might be a bit much, consider something less than 6k miles. I do 5k myself but only for convenience (all my cars are at 5k so it's easy to read the odometer and see if it's due).

During a 5k mile interval, I have to always add one quart. I don't think that's excessive. The nice thing about FA and FB engines is that the oil light simply means you're low on oil, add some now. On EJ engines, an oil light means "you lunched your engine".

If you think the dealer is fudging the oil consumption test, do a few oil changes and then make an appointment with a different dealer. I know that near me, I can easily hit any of 4 dealers and I also know that one of those dealers gets its mechanics from Clown School.

Although it doesn't apply to your car, the newer Imprezas and Crosstreks (17 Impreza, 18 Crosstrek) have direct injected engines. These things are very well known for getting huge amounts of deposits around the INTAKE valves (not exhaust, like normal cars). There are kits to walnut blast and clean these but as one of the threads here showed, at 10k miles, the carbon buildup looks worse than a 140k mile Ford 302 exhaust valve (only car I can visibly remember myself). I don't know how this will be addressed by the car manufacturers going forward.

Last edited by Jack; 01-18-2018 at 07:46 PM.
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Old 01-18-2018, 06:22 PM   #54
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Yeah beating the **** out of an engine daily isn't any good for it or its surroundings

But a WOT here and there doesn't hurt either. Key primarily is to drive the car until it's fully warmed up rather than taking short trips.

Getting back on topic, the fb Subie engines have had reported oil consumption issues and a lawsuit over it. All cars burn oil, some more than others.

Also why are Wankel engines in this discussion, too many armchair engineers here
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Old 01-18-2018, 08:07 PM   #55
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Just looking, I'm NOT going to add anything, just want to read the posts. This is one I will stay out of.
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Old 01-18-2018, 09:35 PM   #56
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Quote:
Originally Posted by jasonwrx86 View Post
Has the bike been babied for a while? Never hit above half of its redline over 3000 miles?
Soot is mostly carbon. Any hydrocarbons can turn into carbon after being burned without enough oxygen.
To maxium horsepower meaning there will the max amount of exhaust flow to loosen and remove any kind of carbon built up.
Maybe I was not making myself clear. I was referring to OP's oil burning engine maybe try some italian tune-up to see if oil consumption changes.
Here is a paper about how piston ring sticking, varnishing, and clogging. It does mention high heat can remove chemicals from stuck rings.
http://papers.sae.org/390014/
You didn't buy that paper and read it did ya? And I bet the oils used in that SAE paper carboned rings up real good. It was published in 1939! Irrelevant. Tell ya what if I source a case of oil from the '40s will you run it in yer car? And attempt an "Italian Tune Up" while running it?
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Old 01-19-2018, 06:11 AM   #57
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Forum censoring now.
disappointing

What was against the rules about carbohydrate posts?
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Old 01-19-2018, 07:38 AM   #58
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Old 01-19-2018, 09:19 AM   #59
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Nice one^
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Old 02-18-2018, 08:06 PM   #60
iandv23
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is there such a thing as normal oil consumption for our cars?
mine is a 2010 subaru STI and been consuming oil despite good leakdown test and compression test.
Installed crawford V3 AOS and it helped a lot but during trackdays would still consume oil
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Old 02-18-2018, 10:34 PM   #61
Jack
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Quote:
Originally Posted by rtv900 View Post
Forum censoring now.
disappointing

What was against the rules about carbohydrate posts?
It's called doing work so another mod doesn't come in and DTS the whole thread (which does happen).

You're welcome.
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Old 02-19-2018, 08:20 AM   #62
Charlie-III
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Quote:
Originally Posted by iandv23 View Post
is there such a thing as normal oil consumption for our cars?
mine is a 2010 subaru STI and been consuming oil despite good leakdown test and compression test.
Installed crawford V3 AOS and it helped a lot but during trackdays would still consume oil
Not really, some burn essentially nothing between oil changes others burn a quart or two between changes (yes, some even suck more than that with good numbers like compression and leakdown).

As mentioned in this thread, there are many things that help or hurt oil burn.
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