engine oil - Honda Rebel 300 & 500 Forum
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post #1 of 18 (permalink) Old 05-20-2017, 09:48 PM Thread Starter
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engine oil

so here's the story. coming up soon on a oil change. nearest honda dealer is 4hrs away. local shops, have no stock on 10w-30 oil. they do have amble 10w-40 oil.

so my question, can we use 10w-40 oil in these bikes? any recommended brand? regular motorcycle oil or synthetic?

i got two bottles of castrel 10w-40, it was on sale for dirt cheap and always had good luck with castrel on all my vehicle but would really like to know for sure before I go ahead and do anything. any input be great. thanks in advance.
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post #2 of 18 (permalink) Old 05-20-2017, 10:53 PM
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Why not just order the right stuff online?
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post #3 of 18 (permalink) Old 05-20-2017, 11:01 PM Thread Starter
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Canada. No online Honda store and don't want to pay retarded shipping just to ship it here cuz Fort McMurray lol
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post #4 of 18 (permalink) Old 05-20-2017, 11:02 PM Thread Starter
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We pay extra shipping like crazy for Fort McMurray
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post #5 of 18 (permalink) Old 05-20-2017, 11:19 PM
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You don't have a new member statement about what your bike is so I don't know if it is the thumper or the twin.

Can you not find Shell Rotella T-5 10W30 in Fort McMurray? WalMart ships that stuff to stores if ordered. Here's my order (shipping was free):

Arrives by: Fri, Feb 10
We'll send an email with tracking
info when your order ships.
Shipping to:
​John Sonderegger
​deleted
​Green Valley , AZ 85614
Item Qty Price Total


Rotella 10W-30 T5 Motor Oil, 2.5 gal 1 $40.77 $40.77


This is used in a 471 cc twin. I have also used Castrol 10W-40 in the bike, but the oil pressure at idle is so low (13 psi) that I really didn't want to use a higher viscosity oil. I currently have 15K miles on the bike and needed to adjust the shims recently (ahead of schedule; all 8 shims needed to be downsized 0.05 mm (two size drop)). I am a "maintenance nut", changing oil and filter every 3000 miles. YMMV

John '14CB500XA (Daily Rider), '09CRF230L (Li'l Red Piglet), '89NX250 (sold), '01Rebel250(sold)
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1st bike: a gently used 1958 Matchless 250 thumper

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post #6 of 18 (permalink) Old 05-20-2017, 11:25 PM Thread Starter
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Rebel 300 is my bike lol
Yes we have a Walmart, and they are completely out of 10-30 anything lol. Which is typical, fort McMurray never has stock when you need it.
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post #7 of 18 (permalink) Old 05-20-2017, 11:36 PM
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Well use the 10W-40 but consider an early change again. I don't have a Service Manual for the 286 cc engine, so I can't check the oil pressure, but, I will bet that it is similar. I was worried about getting good top end lubrication with higher viscosity oils. That was never a problem with the old air-cooled stuff (much bigger tolerances) but the modern water-cooled engines run very tight specs and prolonged use of higher than spec viscosity oil might cause a problem. Why take a chance? Have them order it in with their regular shipments.

The Rotella will not have energy conserving additives. Standard automotive oils will have have those additives. I do not think that moly is used anymore, but that was the bugaboo 25 years ago; moly can lead to clutch failures for bikes like ours, where the engine and transmission share the same oil.

John '14CB500XA (Daily Rider), '09CRF230L (Li'l Red Piglet), '89NX250 (sold), '01Rebel250(sold)
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post #8 of 18 (permalink) Old 05-21-2017, 01:59 PM
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Which Castrol oil is it? Because just being 10-40 vs 10-30 isn't the only thing that makes it correct for the bike.
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post #9 of 18 (permalink) Old 05-21-2017, 05:08 PM
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He probably has Castrol GTX 10W-40 which has no energy conserving additives. I have used it in all of my older motorcycles and the '99 Miata.

John '14CB500XA (Daily Rider), '09CRF230L (Li'l Red Piglet), '89NX250 (sold), '01Rebel250(sold)
Propelled by Penguin Power
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post #10 of 18 (permalink) Old 05-21-2017, 05:57 PM
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Quote:
Originally Posted by jsonder View Post
He probably has Castrol GTX 10W-40 which has no energy conserving additives. I have used it in all of my older motorcycles and the '99 Miata.
Castrol GTX is a Jaso MB oil and not a Jaso MA oil.

I am pretty sure using it would void your warranty.
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