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Discussion Starter · #1 ·
Has anyone used this on their MR2 before oil change?

I’m considering doing it to see if it helps with oil consumption; maybe it will free up sticking piston rings? I used it previously on my diesel excavator and it made a considerable difference. It reduced blow by gases and exhaust emissions a lot and made it easier to start.
Can you think of or know any harm it may cause?
 

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Discussion Starter · #5 ·
My thinking is there might be a point when excessive oil consumption can’t be corrected so I wanted to be a little proactive.

The car is using a little over a quart in an extended interval of 8,000 miles so it’s not too bad yet and can probably be improved just by reducing the interval to 4,000 miles.

It’s only recently, after ~130k miles that it began using any noticeable amount. Currently, it’s at near the 140k range. It’s a 2003 and still has the precats (too lazy to gut them and haven’t checked them in a while) + it’s the wife’s car and she drives the crap out of it. She likes to start it in the morning, then immediately hit the gas pedal. It’s also an SMT and never had the slightest problem other than a clutch.
 

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Discussion Starter · #6 ·
I tried a BG product years ago when my spyder had 60k on the engine and was using more oil than I liked. I did it a few times in a row and it reduced the oil usage for a long time. At 120k it was using more oil than I liked so I replaced the engine with a brand new one :) I haven't used measurable oil in the last 55k and only check the level before a change now :)

Try it but follow directions
You beat me to posting!
That is what I’m hoping for.
 

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Discussion Starter · #9 ·
A quart every 8k is not bad. When you said it was a oil burner with stuck rings I thought you meant a real oil burner with stuck rings. My "jdm" piece of crap was burning a quart every 150 miles ! Now that's stuck rings.
Id strongly suggest you try changing my oil change intervals to like 2.5 to 3k. And you may burn close to zero oil by the third change. Skip the snake oil.
I'd use the mobile1 in everthing but my spyder. In my spyder I use Castrol edge because its supposed to have better thermal breakdown limits. Been good for me. I believe the hype. I'd would also highly suggest sticking to the factory recommended oil viscosity.
The 4.7 V8 in my 4runner is very easy on oil I go up to 6k between changes. My 93 Toyota v6 gets 3k oil change as does the triton v10 in my motor home. Spyder gets oil change by 2.5k religiously. Usually by 2k.
My 2 cent which is likely not worth a penny. But I'd try the more frequent changes as oil is cheap. So is most snake oil but.... And pricy snake oil is no better. Likely worse. Your engine was designed to be lubricated by high quailty engine oil not solvents.
I appreciate the thought that went into that. It looks like we’re both experimenters.

I’m definitely going to reduce the interval for a while to see what happens. I especially liked your last statement, about being designed/lubricated with oil and not solvents, as it makes sense and answers my question about harm. The instructions on the bottle does say to run only 5 minutes with it and only at idle and no load; I’m guessing this is the reason why.
I probably wouldn’t be as eager to experiment if it were my car (newer with half the mileage) and I didn’t have another engine laying around from my first MR2 that my wife wrecked.

I can’t even imagine using a quart every 150 miles! That’s like driving a 2 stroke or worse. People must have thought you were running a diesel with all the smoke?

The part I dislike is having to check the oil all the time. It’s great when you don’t have to check it between oil changes. It’s a pain when it just needs a little bit added. Walmart has that tube thing that goes on the end of a quart bottle with a cap so a little can be added, and not spill it all over, then put the cap back on and store it this way.
 

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Discussion Starter · #12 ·
Wait a minute, a 2003 should not burn any oil if it was made after 8/2002.

If I’m correct that’s when they started to put in the redesign 1ZZ


correct me if I’m wrong
I think you’re correct but that doesn’t mean that the new design will never burn any oil. I would think most will use some oil at higher mileages. My longer intervals are probably a factor as well.
It would be interesting to see if people could post their mileages, intervals, and amount of oil used. On my wife’s car, with the 8k interval, it seems very little oil is used up to ~5k miles then starts using considerably more. Most people change their oil at ~ 3k miles and so probably wouldn’t notice much change. Something else to consider is how hard the car is driven. It might be just as important to judge by the color of the oil as it is the mileage or combine the two for oil changes. This of course, wouldn’t work for my diesel as the oil turns black soon after changing it.
 

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Discussion Starter · #21 · (Edited)
I'm a simple guy....any amount of oil consumption that makes me need to add more in between changes is what I consider 'high'. It doesn't make sense to me how an oil change interval within the objective effective range for a given oil would make a difference in oil consumption...am I missing something there?
I’m not exactly sure what you’re asking but if you mean, “why would a change in interval from 4k miles extended to 8k miles, consume more oil” then, I would guess because the oil has degraded and thinned out, allowing more oil past the rings. In other words, it consumes more oil in the last 4k miles than the first four. Is that what you were asking?
 

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Discussion Starter · #23 ·
If you do an oil analysis & the quality of the oil is acceptable both at 4k miles and 8k miles then it is still within it's objectively effective range (not what the manufacturer states, not what ppl themselves believe). So if it is still working effectively then it makes no sense to me that the amount burning would be different.

If the oil has thinned out then it is no longer 5w-30 & thus no longer in it's objectively effective range. If its picked up too much contamination from blowby, etc then the same logic applies. That's my question (if that made it clearer at all).
Assuming that the oil is performing properly over the entire 8k mile range, then I would conclude that the oil consumption is engine caused and that the consumption should be consistent; in theory. No oil analysis has been done so I can’t explain why it seems to be using more oil latter in the interval other than what’s been said. Maybe it’s just a new norm for this car and the future consumption will be more consistent but I have to take into consideration other factors such as high summer temps, and how hard the car is driven, etc. And I’ll try to monitor it more closely, paying attention to the color, and when it begins using oil to determine the best change interval. It might even be considered normal giving the mileage and why I asked for data. Thanks to everyone who contributed!
 

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Discussion Starter · #30 ·
Check the pcv hose. If it has an oily residue on the inside, this means oil is coming out of the crankcase through this hose and being burned in the cylinders. Some oiliness is normal. It's excessive oiliness you want to watch out for. If you are really interested in finding out how much oil is coming out the pcv, install a catch can on the pcv line. For temporary testing, you can use a water/oil trap for an air compressor, that you can buy at any hardware store that sells air compressors, for under $20. For whatever reason the air/oil separator in the valve cover seems to lose its effectiveness on some cars. I really haven't delved into it too much, but on some I've resorted to just replacing the valve cover with one from salvage, and this did the trick of eliminating excessive oil consumption. This will not work on every car. Oil consumption is a complex issue. You can easily miss the forest for the trees.
Thanks Frankster, that’s great!
I had considered the pcv system but couldn’t come up with anything. That’s good to know.
This is definitely the issue with my diesel tossing out oil from the crankcase vent. There is no catch can and it just pools under the engine. The motor medic helped by cutting down on the blow by gases. Before the treatment, it looked like it had a second tailpipe and now the gases are less and pretty clear; not like diesel smoke anymore.
Aloha
 

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Discussion Starter · #31 ·
Has anyone tried an Italian tune up? That's at least 4500 RPM for at least 5 minutes. (Italians--and Brits--do this in the highest gear, hence the name.) It will sometimes burn out the accumulated stuff in cylinders. It's fun, too... Be safe, though. Don't speed.
Haven’t tried it but I’m sure the wife has.😂
I did do that with an 83 escort while running an RX treatment on my way to the emissions station for the thirteenth time and it passed.
 

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Discussion Starter · #33 ·
Went to do the oil change today and thought I’d do the smt fluid, took the air cleaner apart and saw this. They struck again!
Hood Motor vehicle Automotive lighting Blue Automotive tire
I wondered where the insulation went when I found the deck lid insulation chewed up.
 

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Discussion Starter · #40 ·
Here is a link talking about the color of oil.
Liquid Cosmetics Fluid Font Material property
 

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Discussion Starter · #41 ·
So I considered that the clogged air filter might have caused the higher oil consumption and read that this is a possibility. It stated that a severely clogged air filter can cause a higher vacuum and pull oil past the valve seals and also mentions causing a problem with the air/oil separator in the pcv system, bringing oil into the intake tube but no oil was found there.

From my records, it appears that oil consumption increased by 2.5 times after 4573 miles, later in the interval. Maybe this is when the rat made a nest in the air box; I don’t know.
 

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Discussion Starter · #46 ·
Unlikely since the vacuum at idle is much higher than at full throttle with a dirty air filter.
Thanks, I was hoping to get an opinion from you! Do you have any explanations why the car would suddenly start using oil?
The only other thing I could think of is that maybe I failed to record adding oil early on in the interval. How common are hallucinations after the age of 60?
I know that I get dizzy every time I get under the car now.😵‍💫
 

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Discussion Starter · #47 ·
I have... make sure you take the oil pan off and clean out afterwards. All in all it doesn' t solve the problem though. It will only get worse.
I did read where it said to be safe, remove the oil pan. Who wants to do that? Considering the feedback on here, I decided to compromise and only use 8 ounces of the 32 ounce container and let it completely drain overnight. This might sound weird, but I also blew out more residual oil with compressed air; didn’t want any solvent left in there. After driving it a bit, checking the dipstick, the oil looks as clean as what I put in there.
 
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