Technique

Ya, I should have paid more attention

But anyway, if we can't get TBN, what's the verdict from looking at the numbers in the report? Was it OK to wait 3 years?

From comparing to your oil, it looks roughly the same... Same ballpark... And blackstone didn't say anything like "this oil appears to be 3 years old"... But I don't know what most of those #s mean...

Gernby

iTrader: (1)

I'm not an oil expert at all, but every manufacturer uses different materials to build their engines (rings, cylinder linings, bearings, etc.). That means that the individual element levels will be different between different engines when doing a UOA. There were a few elements where my UOA showed higher levels than yours (copper, tin, silicon), but the rest were higher in yours, and many of them were magnitudes higher than my sample AND the average (aluminum, molybdenum, mangenese, potassium, sodium, barium).

The only way to really know the full story is to see the TBN, and also see what other UOA's look like from the same model's engine when changed at the scheduled interval.

Technique

I have great news! I talked to Blackstone today, and they still have my sample and will perform the TBN test and generate a new report for me by end of day today! I'll post the results when I get them...

Gernby

iTrader: (1)

Sweet ... thanks!

gsrthomas

iTrader: (1)

15k oil changes on your new IS?

I few sorry for your car.

I always change the oil sooner then recommended.

GS Kid 300

Cant wait for the results.

Technique

OK, I called them up today since I had not received anything... Turns out they left early Monday and were closed yesterday because of the blizzard... She said they will send out my report today but that my TBN was 3.9 which means I stilll had some active additive left... I'll post the full report when I get it but it didn't seem like there would be much more info than that? Is TBN just a single #? If so, it's 3.9 for my oil... So what's the verdict?

Technique

OK, here's the final report. Looks like the oil could have still kept going... Thoughts?

Gernby

iTrader: (1)

The TBN is better than mine after 5K miles and 4 months. I don't understand how that is even possible unless your Jag has a HUGE oil capacity.

Technique

I believe the mechanic told me he used almost 7 quarts to refill...

Gernby

iTrader: (1)

Strange. The IS requires over 6 qts as well...

Technique

Maybe the Jag engine is cleaner burning or whatever...

Anyway, I am going to wait 10000+ miles and 1+ year to change my IS350 oil... I'll do a TBN analysis on that as well... But that's 9 months out, at least...

Anyway, I guess we now know that oil doesn't totally disintegrate with low-use over time...

DASHOCKER

iTrader: (2)

People will continue to be critical regarding oil change intervals with synthetic fluids. This report reflects what many have been saying including myself regarding sythetics. I have Amsoil everything in the GS4 & Rav4, while the X3 has the factory German Castrol.. Not putting the bacon grease dino oil in my rides ever again.

Technique

Are you saying that my jag had synthetic oil in it from the factory?

Lexmex

That German Castrol is the best thing I ever put in my RX300, very smooth. Too bad they don't sell Amsoil down here, as I would like to use their ATF.