XR engine oil (which is best?)

Introduce yourself, what you ride, post pics, seek or offer help, general chit-chat.
User avatar
Site Admin
Posts: 1183
Joined: Mon May 02, 2016 8:06 pm

XR engine oil (which is best?)

Postby 4Strokes » Fri May 13, 2016 6:56 pm

Topic: XR engine oil (which is the best for an XR?)
Author: tomoiq
Posted: 02/07/2007 06:32:47 AM


can you please advise which engine oil is the best for XR. I mean synthetic or mineral, and viscosity 10W or 15W?

Thank you for replies...

Reply by 4StroKen on 02/07/2007 09:13:18 AM
my 650R likes 10/40 wt

Reply by 4Putter on 02/07/2007 12:32:25 PM
Here where its cooler I run 5w-30. I just buy the Honda brand...at least it has Honda all over the label...

Reply by ikarus1 on 02/07/2007 2:55:55 PM
Castrol Syntec OW30 winter (thick 30 weight viscosity but easy to start) and Delo synthetic 5W40 in summer (gallon is $15 at walmart)

Reply by Sanosuke on 02/07/2007 3:37:56 PM
Currently running 5100 Ester 10W40 in my XR250R.


Reply by b_king on 02/07/2007 4:56:29 PM
Any 10w40 MOTORCYCLE specific engine oil. Do not use any automotive types of oils, they are designed for a different application. Synthetic or mineral is up to your wallet, for a stock engine I would use mineral. Anything that has lots of engine modifications, you would want to consider running a full or semi synthetic to help reduce heat and friction.

Good luck!

Reply by ikarus1 on 02/08/2007 11:50:37 AM
To answer the original poster, the first number means nothing except cold start-up viscosity, and the lower the better, esp. in cold temps when you want oil to flow as fast as possible to prevent wear. The higher number is the protection you get @ 100 deg C.
thick 30 weights, 40s and 50s all give decent hi-rpm protection, with 40 being the middle of those.

Excellent website for this topic is Bob The Oil Guy and the associated forums. Many posters are involved in the oil industry and have years of experience with all types of oil-related subjects. I suggest you educate yourself before making any recommendations on any subject.

This opinion is based on solid research and not speculation:

The factory service manuals for all my bikes does not specify anything
other than API rated SG or better oils, nothing about motorcycle-specific. Most of those oils are making alot of profit on marketing.

10W40 "mineral" or "dino" oils, regardless of manufacturer, are the chemically "weakest" of all engine oils due to the large spread bewteen the cold and hot viscosity range. Thus all of them typically have a low service life. If you change your oil every other ride (thus flooding the enviroment unnecessarily with used oil), they work. It's just an "OLD-SCHOOL" obsolete weight that is from the 70s. Even the API SG rating is like 10 years old... we are using SM now, although anything SL is light years better than the SG oils.

Back to the service manual recommendations (mostly from Honda):
It also gives a temperature range vs weight of oil, thus explaining the summer and winter differences I posted in my reply. I have maintained a few vehicles for more than 175K miles each using this formula that I also use in my bikes.

Personally, I'd find something a bit more robust, such as a good synthetic oil or perhaps an HDEO like diesel engine oils (EG: Delo syn or regular, Shell Rotella, etc)which are also rated for any 4-stroke gasoline application. These typically have strong detergent packages which tend to keep rings, valves, and transmission plates clean. They also have LONG service life, being designed for HD engines that go many miles between oil changes. 25 to 50 hour intervals in a crankcase in a bike will not phase these oils much.

I know when it's time to change oil when my bike doesn't shift buttery-smooth, especially on the smaller auto minibikes.

Reply by tomoiq on 02/11/2007 04:17:43 AM
Thank you guys... I decided for Valvoline 10W40 semi synthetic for 4strokes motorbikes. I guess - compromis for my wallet and good food for XR in session 2007

Reply by xrlke on 02/11/2007 7:47:32 PM
I run either 10w30 or 15w40 shell rotella T, depending on the temps. The rotella is cheap compared to motorcycle oils and has the zddp to protect the cams, valves, rockers, etc.

Reply by ikarus1 on 02/12/2007 10:04:51 PM
Here's a brief synopsis of why 10W40 is not good for any air-cooled engine: All About Oil

Pay attention to the subheading: Making Multi-Grade Oil

it's pretty simple really and explains why many people are moving to a 15W40 HDEO oil for many motorcycles.

The shell rotella T synthetic and Delo 400 5W40s are my two recommendations for any air-cooled honda 4 stroke.

Reply by kids_dad on 03/04/2007 12:21:23 PM
Mobil 1 5w50 without the starbust.

Reply by thestuz on 01/03/2009 8:43:16 PM
i live in australia with hot climate. i use 20w 50 on 98 xr 600 and wher changing to a poerformance piston and checking the clutch plates,noticed almost no piston barrel,or clutch plate wear at all., i change it every 700 kms,cheap oil too. my bike has done 13,000 kms

Reply by Dubl-A on 01/09/2009 2:22:09 PM
quote: Originally posted by b_king
Any 10w40 MOTORCYCLE specific engine oil. Do not use any automotive types of oils, they are designed for a different application. Synthetic or mineral is up to your wallet, for a stock engine I would use mineral. Anything that has lots of engine modifications, you would want to consider running a full or semi synthetic to help reduce heat and friction.

Good luck!

Yo B! Can the 4stroke synthetic be purchased at the honda dealer, or any auto parts store? Same 10-40 wt in synthetic (im in Albuquerque, cold winters HOT summers)?

Reply by ThumperTDC on 01/13/2009 5:43:33 PM
Your local honda dealer may have something you can run. I have been running AMSoil for a few years now and love the stuff. All my bikes use it, it in my wifes jeep and I will be soon changing my truck over to the stuff. I used to get it from a local supplier, but now that a forum sponsor is selling it I will be ordering it only from them.

Reply by Dubl-A on 01/13/2009 6:22:14 PM

What wt do you use?

Reply by Dubl-A on 01/13/2009 6:24:34 PM
DAYYYYUUUMM!!!!!!!! $11 a quart?! "I say GOOD LOOOARD thats a lotta money!!!!"

Reply by ThumperTDC on 01/14/2009 12:13:04 AM
it is alot of money, but it is well worth it. I use 10/40 4 stroke oil in the bikes...............but when I first used it my XR was idling faster with the synthetic oil and I had to turn down the idle. I was sold, without adjusting anything prior to the oil change led me to believe that there was less friction with the synthetic oil. As for my wifes Jeep it is a $60 oil change, but can go up to 25,000 miles before changing it. I have always wanted to try the two stroke oil that you can run at 100:1

Reply by baja rider on 01/14/2009 9:15:26 PM
Mobile 1-15-50 car oil,ten years on clutch.More hard miles in a week then most do in a year.

Reply by Dubl-A on 01/15/2009 10:30:32 AM

Cool, I guess I'll check it out being the bike is my new baby. btw, what type of filter do you use on your Jeep to go 25k? I use Mobile1 but change every 5k (Stock filter only rated for 3k). I tried the 15k Mobile1 but only see 3k filters

Reply by ThumperTDC on 01/15/2009 1:24:47 PM

I run a fram filter. AMSoil can be ran for up to 25k with getting your oil tested and running their filter system I believe. I will run it about 7 to 10k and then change it just because.

Reply by Dubl-A on 01/15/2009 4:55:52 PM

hmmm, I use Fram too but theres no way I'd trust it past 5k on my Patriot. Every time I see the oil and filter they look well used.

Thanks for the info Bro!

Original URL: 4strokes.com/forums/topic.asp?TOPIC_ID=25803 © 2016 4Strokes.com

Return to “Honda Community”

Who is online

Users browsing this forum: No registered users and 0 guests