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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
2009 CRF450R Ride Report
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[QUOTE="Solid State, post: 1312709, member: 22186"] Rich - I'm glad you piped up here as I was hoping to get the staight dope. The manual states to use Pro-Honda GN4 4-stroke oil and recommends 10-30 and no energy conserving label (SG or higher if not using GN4). It warns to only use this recommended oil and not to use additives. It says that using energy conserving labled oil "may affect lubrication" - whatever that means. There is the usual temp chart where it shows 10-40 use at an ambient temperature range (over ~70F). My take from the warnings about deviating from GN4 and not to have energy conserving oil, led me to believe that synthetics were out. Otherwise, I probably would have used Mobil-1, 10-40 Extended Use (I put it with the appropriate weight in everything I have of value and can vouch for its effectiveness over conventional oils). Except of course diesel, which I use non-synthetic diesel that quiets the motor I have found. Too clacky with Mobil-1. As you know, the recommended GN4 is NOT HP4S for all the specifics you stated. The shop says to use GN4 10-40 as it "replaces all the recommended 10-30 applications". So there is my quandry. HP4S 10-30 for all the right reasons, HP4 or GN4 10-40 because the beast gets really hot, or GN4 10-30 because it says so in the manual and seems to make a big deal out of it? Thanks for your help. [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
2009 CRF450R Ride Report
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