Synthetic or not?


12 replies to this topic
  • Portmod7

Posted April 06, 2007 - 08:30 AM

#1

Changin the oil in a YZ and WR450. Is synthetic(mobil 1) a good way to go or not? Not sure if it would harm the engine or anything like that. I can't find in my manual where it says NOT TO, but it also doesn't say it would be better to use synthetic. Any input guys?

Thanks

  • rdefonce

Posted April 06, 2007 - 08:56 AM

#2

Changin the oil in a YZ and WR450. Is synthetic(mobil 1) a good way to go or not? Not sure if it would harm the engine or anything like that. I can't find in my manual where it says NOT TO, but it also doesn't say it would be better to use synthetic. Any input guys?

Thanks


Synthetic, yes.

I use MX4T Mobil 1 10w40, made for motorcycles. It's formulated specifically for motorcycle wet clutches/trannies.

Of course, I've heard a lot of good things about Shell Rotella T, and it's super cheap too.

  • BergArabia

Posted April 06, 2007 - 10:15 AM

#3

Synthetic, yes.

I use MX4T Mobil 1 10w40, made for motorcycles. It's formulated specifically for motorcycle wet clutches/trannies.

Of course, I've heard a lot of good things about Shell Rotella T, and it's super cheap too.

Second those both..
Change it often. It is only 1litre. So it is cheap whichever way you do it. Avoid the friction modifiers.. But I use Mobile 1 synthetic and change every 10 hours max..

  • grayracer513

Posted April 06, 2007 - 02:13 PM

#4

Synthetics ahve several advantages over petro oils for motorcycle use. Do, however, be sure you are not using an automotive oil displaying the API EC II grade in the API circle on the back of the label. These have the potential to cause problems.

Also, oils formulated for cars and/or trucks may not have the ability to retain their viscosity when used as a gear oil, as is the case with YZF's. For that reason, any such oil should be changed every 3 hours, unless you can produce an oil analysis that shows the oil can stay in grade longer. Even some "motorcycle" oils are weak in that area.

Mobil 1 MX4T (now called Racing 4T Motorcycle, I believe) and Amsoil MCF and MCV are 3 oils that do hold up for up to ten hours and more. There are a couple of others.

Read: (page 9)

http://www.amsoil.com/lit/g2156.pdf

  • cowboyona426

Posted April 06, 2007 - 08:03 PM

#5

I ran Mobil 1 gold cap in my 426 for most of the time I owned it, and now run it in my 450. I don't think there's any good reason not to switch.
grayracer, would you be concerned even about an oil like the Mobil 1 15-50 gold cap? I bought several quarts when one of the K-marts near here was shutting its doors cheap and planned to run it for a while, but if I need to be switching now's the time as I'm about to drain my oil and install my new Scotts oil filter.

  • Fullbore4

Posted April 06, 2007 - 08:15 PM

#6

I'm no expert but I was told by a top auto racing machinist not to use synthetic on a newly built car engine for the first 10K miles as it would not break in properly. I didn't use synthetic on my WR for the first 400 miles for that reason......I am not sure if there is any credence to it but I'm interested in other opinions.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • twenty34

Posted April 06, 2007 - 08:17 PM

#7

Changin the oil in a YZ and WR450. Is synthetic(mobil 1) a good way to go or not? Not sure if it would harm the engine or anything like that. I can't find in my manual where it says NOT TO, but it also doesn't say it would be better to use synthetic. Any input guys?

Thanks


Like GR said, there are 2-3 good ones to choose. Thanks to his suggestions and the link to the"oil shootout" he's converted a few of us to better oils. I used to think Yamalube 4R was decent oil until I read the oil tests that GR has provided a link to. Lots of good testing conducted.

I'm using the Mobil 4T Racing currently, but I'll be switching to Amsoil soon.

Listen to GR...:bonk:

  • grayracer513

Posted April 06, 2007 - 08:38 PM

#8

grayracer, would you be concerned even about an oil like the Mobil 1 15-50 gold cap?

Until I saw either a used oil analysis, or the results of a lab shear resistance test, yes, I would. The trouble is that there is no compelling reason for an oil blender to go to the expense of using the tougher VII additives used in gear oils in their automotive, or even diesel lubes unless they are blending an oil for transmissions, so most don't.

I'm no expert but I was told by a top auto racing machinist not to use synthetic on a newly built car engine for the first 10K miles as it would not break in properly. .

It's a myth. Here's a list of the cars that are factory filled with Mobil 1:
* Acura RDX
* Aston Martin
* Bentley Amage and Bentley GT
* Cadillac CTS, CTS-V, XLR, XLR-V, SRX and STS and STS-V
* Chevrolet Corvette C6 and Z06
* Chevrolet SSR
* Chevrolet TrailBlazer SS
* Chrysler 300C SRT-8 and Crossfire SRT-6
* Cobalt SS
* Dodge Ram SRT-10
* Dodge Charger SRT-8, Magnum, and Viper
* Jeep Cherokee SRT-8
* Mercedes-Benz AMG vehicles
* Mercedes SLR
* Mitsubishi EVO III
* Pontiac GTO
* All Porsche vehicles
* Saturn Red Line
* Viper SRT-10

Note it's mostly high performance models. Chevrolet will void the warranty on a Corvette if a synthetic equal to M1 is not used. I have broken all of my engines in on synthetics or synthetics blends for about 20 years, and haven't had one problem as a result.

  • twenty34

Posted April 06, 2007 - 08:56 PM

#9

It's a myth. Here's a list of the cars that are factory filled with Mobil 1:
* Acura RDX
* Aston Martin
* Bentley Amage and Bentley GT
* Cadillac CTS, CTS-V, XLR, XLR-V, SRX and STS and STS-V
* Chevrolet Corvette C6 and Z06
* Chevrolet SSR
* Chevrolet TrailBlazer SS
* Chrysler 300C SRT-8 and Crossfire SRT-6
* Cobalt SS
* Dodge Ram SRT-10
* Dodge Charger SRT-8, Magnum, and Viper
* Jeep Cherokee SRT-8
* Mercedes-Benz AMG vehicles
* Mercedes SLR
* Mitsubishi EVO III
* Pontiac GTO
* All Porsche vehicles
* Saturn Red Line
* Viper SRT-10


Not sure they use Mobil 1 in my car, but my BMW ONLY uses synthetic and my warranty calls for it to be changed every 15K. I thought that was a bit high in mileage, but the Germans tend to know what they are doing. :bonk:

  • rexbond007

Posted April 07, 2007 - 06:31 AM

#10

i used mobil 1 red cap 20 -50 for 2 years in my RMZ 250 put 110 hrs on it.
now i'm using it in my 07 YZF 450.

  • buzzgrizz

Posted April 07, 2007 - 08:06 AM

#11

Mobil 1 MX4T is all I use.

  • grayracer513

Posted April 07, 2007 - 03:55 PM

#12

Since it is the same basic oil that MX4T is, I have no reason to think that it's not a fabulous oil in every respect other than shear resistance, and I am not certain that it has any problem in that regard, either, but absent either of the two tests I mentioned before, it may very well be thinning out on you more than you realize. You can find out, if you're curious. Send a sample of your used oil to Blackstone Labs (their web site has the how-to info). Then you'll know.

  • mxrayser

Posted April 08, 2007 - 12:33 AM

#13

Looks like its time to re-evaluate my choice of oils. My Wesson/Crisco blend may not be up to snuff





Related Content

Forums
Photo

YZ450FX OR YZ450F by MESSMAKER


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  30 replies
Forums
Photo

05 yz450f not fast enough by RedeyeYZ


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  38 replies
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
Forums
Photo
Supercross

Wilson the Blue Privateer by jetfuel


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.