Greg W

I thought I'd share my Blackstone UOA with you. Car is a dedicated track car with ~87k miles. It has ~6 hours of track time on the Motul 300V 5w40 oil (only added ~1/2 qt). AP2 engine is totally stock, with a K&N intake and header-back 3" custom. Haltech ECU is tuned to an 8400rpm fuel cutoff making 224whp on a Dynapack. Had one ~100F day when the oil was new, rest of the hours were run under cool to warm conditions (water temps on track maxed at ~205F). I also haven't installed my Canton oil pan nor oil cooler yet so still working with 5.5qts capacity.


Motul 300V is expensive stuff so I'll probably go with something else and change every 3-4 hours in the future.

zeroptzero

I will preface my comments by acknowledging that it is very hard to summarize these results due to the full-time track use. It will be good to see your trends as you do further analysis comparisons.

I think copper and lead look a bit high. Those wear numbers were even high in the previous OCI's IMO. Definitely keep an eye on these two metals going forward as they represent crucial parts. Aluminum seems about right as does iron for those conditions. Silicon looks good so your air filtering is working well.

Viscosity shearing doesn't look very good, and that may have contributed to higher bearing wear numbers when you consider typical track oil temps. At elevated oil temps seen on the track the oil could have been quite thin. I thought Motul used a much higher moly anti-wear additive in the range of 500 ppm's, unless that is a different Motul formula ? I like to see lots of moly in oils that will be used in harsh conditions.

Look forward to additional info on this car, thanks for posting

bgoetz

Yeah the lead combined with copper would be concerning to me. I have about 4hrs on Amsoil and 3000 miles of street driving, I will be changing it soon so I will be sure to toss my results up. Although admittedly I put in a bunch of makeup oil as a result of my catch can and normal AP1 consumption.

SpitfireS

It seems Blackstone is still using some other spec than SAEJ300.
Because 9.17 cSt is in the 20 weight range according to SAEJ300, allthough it is in the upper range of it.
Also, to say an oil shears down to a 5W-30 is a bit.. silly.. as they for sure did not test in what "W" range the oil is now.

It would be interesting to know how quick the Motul shears down.
I mean, does it shear down to a 20 weight within the first 30 minutes or does it shear down gradually?
That would give you more insight in the wear too.

In a dedicated track can an oil temperature & pressure sensor and an oil cooler are a must IMO.
With it you can see what you get from your oil.

rrounds

And not just any oil pressure sensor. You need one that is adjustable like this
http://www.longacreracing.com/produc...PT+sender+only
Adjust it so a bright light on top of the dash will turn on at 45 to 50 psi, that way you might be able to save the engine before you damage it by low oil pressure. We had one on our drag engine just so we would know if we ever lost oil pressure going down the strip.
The stock dummy oil light is just that, for dummy's. By the time it(stock dummy light) comes on your engine is toast.

ROD

Greg W

Thanks for the input. Based on comments ( and the nagging feeling already in my head) I'll prioritize the oil cooler install a bit higher. Likely not till winter due to time constraints (same ones keeping me off the track now!). With my daughter off to college in a couple weeks I should be able to get in more races in '16 so will have more data.