quote:
Originally posted by tom slick:
Motorex, ELF, and AGIP are pretty rare here but i'd love to hear more about them.
You can get the Motorex at all the KTM dealers now and it's the oil used in the Yoshimura Superbikes .
Motorcycle specific dino oils really are better than dino car oils in the long term . Most have double or more zinc/phos and a distinctive gear oil smell " sulphur " thats not seen through analysis .
The problem is in the markup price . But some have to make a little money to pay their employees and feed their kids right ?
I buy Maxima Synthetic at 22.50 for a 4 liter jug
Motul E-Tech 100 Synthetic 10w-40 5.10 a liter-price just went up from 4.90
The Motul 300 4T dino is only 10.35 a gallon
As example in car oil vs MC dino the Motul uses double the phos/zinc and boron that Castrol GTX 10w-40 has . Also adds to better protect the gears thats not seen through analysis .It uses a superior vi index improver and little of it . The vi @ 40c is quite a bit higher in the MC oils .
Motorcycle shifters will analise the oil for you to an extent . Excluding most of the Honda's which are rather notchy , the shiftability
starts deteriorating at around 1k miles with low cost 10w-40 dinos in most bikes .
I've seen GTX 20w-50 at a 30wt in a friends bike when analised at 2600 miles .... he did not like the thought of a 30wt in his motor so he switched to a better oil .
The HD Diesel 15w-40's are not any better in this respect . Mobil Delvac 1300S sheared 2 full cSt's in I think 2600 miles in a somewhat low performance inline 4 cylinder bike compared to most high strung motors made today .
Some of these HD Diesel oils will not meet the Navistar Foam Sequence test criteria ...carefull with your selection there .
Compare the data sheet of the Castrol ACT-EVO 4T 20-50 dino which has an ester to the GTX 20w-50 dino
ACT EVO API SG
vi @ 40c 171
Vi @ 100c 18.7
HT/HS 4.8
Shear stability ' KV loss @ 100c ' 10
Volatility % 6.2
EDIT:
I lost my GTX data sheet ... I'll ask Patman to some to the rescue and post it later .
In the meantime here is a MC specific 5-40 synthetic race oil .... you'll not find a street car or suv 5-40 capable of running a endurance race without burning off alot of oil and reducing friction of the amount equal to say 5hp . Even a 1 second per lap advantage adds up in shorter 8 lap sprints or 4 hour endurance races .
They can run all those bench tests they want , it's the real world that counts and for racers it's not all about the lowest wear numbers . It's all about a motor oil that will not shear , burn off , window the motor resulting in a DNF and costly repairs .
VI 40c 80
vi 100c 13.0
HT/HS 3.9
Shear Stability " KV Loss " 0.1
Volatility 5.0
Flash Point 208c
TBN 8.3
API SG
[ March 18, 2004, 07:43 AM: Message edited by: Motorbike ]
