Latest Oil Analysis

Blackstone Labs
Equipment Make & Model: 2008 Toyota Prius
OIL TYPE & GRADE: Mobil 1 5w30
Make-up oil: 0
OIL USE INTERVAL: 10,000
Miles on unit: 37,000
Sample Date: 11/10/2009

We found no significant change in the latest sample from your Prius. The 10,000 mile oil changes are
working well for you but we think you could easily be going longer on your oil. Try ~12,000 miles next time
and check back for another look at wear. Silicon improved a little here and should continue to do so with
each oil change. The trace of fuel that we found isn't an issue and no other harmful contaminants showed
up. You still had plenty of active with a TBN reading of 3.5. We consider a reading of around 1.0 too low for
extended use. All in all, a good report.




ALUMINUM -4
CHROMIUM -0
IRON -14
COPPER -2
LEAD-0
TIN-2
MOLYBDENUM-84
NICKEL-0
MANGANESE-1
SILVER-0
TITANIUM-0
POTASSIUM-2
BORON-38
SILICON-23
SODIUM-5
CALCIUM-2333
MAGNESIUM-12
PHOSPHORUS-666
ZINC-809
BARIUM-0


cSt Viscosity @ 100°C 55.72
SUS Viscosity @ 210°F 8.99
Flashpoint in °F 365
Fuel % TR
Antifreeze % 0.0
Water % 0.0
Insolubles % 0.3
TBN 3.5
TAN
ISO Code

 

Yep- no need to change them any more frequent- next time I run Amsoil, I'll go up to 20k with a Mobil 1 filter, or a Pure One 14477 (oversized).


Current fill I have is with Mobil 1 extended, I'm going to go to 15k.

 

5w30