RLI Biosyn 5W40 2007 Subaru STi (dyson analysis)

[flatfour562]

Car is driven the same with both oils. No track days yet, but a couple of canyon rus with the RLI.

Are you talking about oil consumption? If so, no oil consumption so far.

 

[SilverGGA]

Yes, I was talking about oil consumption. Thanks for your reply!

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Car is driven the same with both oils. No track days yet, but a couple of canyon rus with the RLI.

Are you talking about oil consumption? If so, no oil consumption so far.

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[SilverGGA]

Does anyone know how RLI reduces fuel dilution? Is it because it seals the rings better? If so, it might reduce blowby and oil consumption turbo Subarus see.

I'm interested if RLI can make my ~0.5 quart per 5k miles consumption disappear.

 

[benjamming]

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Does anyone know how RLI reduces fuel dilution? Is it because it seals the rings better?

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Terry's comment

 

[theedge67]

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I'm interested if RLI can make my ~0.5 quart per 5k miles consumption disappear.

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You are worried about 0.5qt in 5,000 miles??

 

[RI_RS4]

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I'm interested if RLI can make my ~0.5 quart per 5k miles consumption disappear.

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You are worried about 0.5qt in 5,000 miles??

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Actually, I'm with you. 1/2 qt in 5K miles is a good thing. Many times when engines show no oil consumption, it is due to fuel replacing the oil.

 

[SilverGGA]

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I'm interested if RLI can make my ~0.5 quart per 5k miles consumption disappear.

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You are worried about 0.5qt in 5,000 miles??

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Actually, I'm with you. 1/2 qt in 5K miles is a good thing. Many times when engines show no oil consumption, it is due to fuel replacing the oil.

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In a perfect world, no fuel gets into the sump, and no oil gets pushed passed the ring, and results in no consumption. That is my perfect world

 

[RI_RS4]

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In a perfect world, no fuel gets into the sump, and no oil gets pushed passed the ring, and results in no consumption. That is my perfect world

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Well then, in your perfect world the engine fails. Some oil consumption is absolutely necessary to insure upper cylinder lubrication. Any oil film that is left on the cylinder walls by the rings will be burnt. It is physically impossible for all of the oil to be scraped off the cylinder walls by the rings. Therefore, some oil will be consumed.

 

[buster]

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Some oil consumption is absolutely necessary to insure upper cylinder lubrication. Any oil film that is left on the cylinder walls by the rings will be burnt. It is physically impossible for all of the oil to be scraped off the cylinder walls by the rings. Therefore, some oil will be consumed.
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So true. I've read that engines that consume some amount of oil vs those that don't will last longer.

 

[SilverGGA]

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In a perfect world, no fuel gets into the sump, and no oil gets pushed passed the ring, and results in no consumption. That is my perfect world

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Well then, in your perfect world the engine fails. Some oil consumption is absolutely necessary to insure upper cylinder lubrication. Any oil film that is left on the cylinder walls by the rings will be burnt. It is physically impossible for all of the oil to be scraped off the cylinder walls by the rings. Therefore, some oil will be consumed.

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But doesn't it seems that 1 quart per a few thousand miles of oil burnt off on the cylinder walls a bit excessive? By no consumption I should have said / meant, no noticable consumption that requires adding oil in a short OCI eg below 5k.

However, I see your point. Thanks.

 

[bluesubie]

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But doesn't it seems that 1 quart per a few thousand miles of oil burnt off on the cylinder walls a bit excessive?

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Don't forget that SOA and a few manufacturers consider 1 qt per 1k miles acceptable consumption. Although I think Subaru recently changed it to 1 quart per 800 miles.

FWIW, I don't get much consumption with GC. I add 5 full quarts (manual calls for 4.8 for those that are curious) and I'm usually halfway between low and full on the dipstick at 7k miles. I had a little more running Motul 8100 5W30. Consumption definitely varies in these cars between oil used, driving conditions, etc.

-Dennis

 

[Titan]

I get 1/8 quart consumption with a normally aspirated Subaru per 7500 miles with Pennzoil Platinum 5w30, going about 75 mph most of the time. Not enough to even top off between OCI's.

 

[allwheelsdriven]

we also had a discussion on nasioc about engine braking causing some oil loss....or downshifting to brake for that matter. Any opinions?

 

[Saab9-3]

1 qt per 800 miles? How do the cats hold up, dont they get gummed up with oil ? Just crazy to me. My saab does not burn a drop of oil, no matter how I drive.

 

[flatfour562]

Here's my second uoa on RLI 5W40. 4330 miles on oil and 23k on the Subie. I got my car retuned with lots of dyno pulls, spent 1 hour on the dyno. Used 2 32oz can of unleaded Torco race fuel accelerator. The lead reading are high and its probably from the antiseize I used when changing spark plugs.

iron 8 6 11
copper 19 195 290
tin 9 0 0
lead 7 9 70
chromium 0 1 1
nickel 0 3 2
aluminum 8 3 5
titanium 0 0 0
silver 0 0 0
calcium 1761 2729 2938
magnesium 20 14 14
zinc 1432 1756 1875
phosphorus 1447 1554 1364
barium 1 1 0
moly 1288 89 13
antimony 0 197 268
silicon 32 10 8
sodium 9 8 12
boron 0 1 1
potassium 0 0 0
vanadium 0 0 0
v40c 51.4 78.0 90.1
v100c 9.0 14.1 15.6
tan 1.80 2.32 0.24
flash 280 365 355
oxid 27 143 157
nit 6 9 12
kf 345 1517 1123
tbn 3.6 9.6 6.7
fuel 1.64 .799 .953
soot 0 0 0
glycol 0.52 0 0
vndx 157 188 184

 

[SubLGT]

Originally Posted By: flatfour562
.......The lead reading are high and its probably from the antiseize I used when changing spark plugs. ..........


AFAIK, antiseize does not contain lead. What brand did you use?

 

[Titan]

Did you mean the copper was high from anti-seize?

 

[Pablo]

Quote:
Here's my second uoa on RLI 5W40. 4330 miles on oil and 23k on the Subie. I got my car retuned with lots of dyno pulls, spent 1 hour on the dyno. Used 2 32oz can of unleaded Torco race fuel accelerator. The lead reading are high and its probably from the antiseize I used when changing spark plugs.

iron 8 6 11
copper 19 195 290
tin 9 0 0
lead 7 9 70
chromium 0 1 1
nickel 0 3 2 ....
v40c 51.4 78.0 90.1
v100c 9.0 14.1 15.6


Well Copaslip does contain a little lead, but how much did you put on? No way did 70 ppm come from spark plug antisieze. I would think it's the fuel additive and the driving style. Ni is not good either....nice viscous oil, but I wonder about the true cold temp properties.

I'd run a synthetic straight SAE 30. You wouldn't have all that copper additive, and you would still be violating your warranty for over the top Phosphorous, but at least the viscosity would allow a freer spinning turbo (and probably less wear)!

 

[benjamming]

What's the reason for the race fuel accelerator?

Is TAN correct at 0.24? That's lower than the VOA of RLI 5W40.

 

[SilverGGA]

flatfour562, did you need to add any oil in your 2nd RLI OCI in 4330 miles? Thanks.