OIL - Auto vs Motorcycle (Petro vs Synethetic)
I was doing some research lately on oil. I've always used Honda HP4 (petroleum/synthetic blend) in my CBR900RR. It made a noticable difference in performance and shifting on the 900. I've been using the Honda GN4 (petroleum) in my 400ex. I spoke to the parts guy at Honda and he said that the HP4 oil is ok in the 400ex as long as it says "without moly". The HP4 oil they had, did not have moly in it. I was wondering "whats the difference"? Also, I was wondering what was so special about the GN4 oil at $3.99 a quart vs good old Castrol GTX that you can get on sale for $1.49 a quart at WalFart. I searched the Internet and came across a Professor at a University that tested oils. He tested Castrol GTX, Castrol Syntec, Golden Spectro, Honda HP4 and Mobil 1. As it turns out the synthetic oils were DEFINITELY better than straight Petroleum oil .... which makes sense. But the funny thing was that the Golden Spectro motorcycle oil was no different than the Castrol GTX. When the University contacted them, they had no comment. All the motorcycle manufacturers like to use the fact that motorcycles spin upwards to 14,000 rpm's and the oil lubes the engine, trans and in some cases the clutch. This is the big SUCKER marketing scheme that catches all of us. As the report finalized the Synthetic Mobil 1 oil was the BEST oil out of the bunch. At $3.49 a quart its a real bargain compared to Honda's HP4 oil at $6.99 a quart. If you're buying Petroleum based oil the report said to save your money and buy Castrol GTX. As for the moly issue that the parts guy brought up at my Honda dealer, I'm not sure about and I don't know if Mobil 1 has moly in it or not. But I thought the report was interesting and that everyone on this forum may be interested in it. Needless to say, I'm going to be using Mobil 1 in my car and possibly in my bikes. Otherwise, I'll use the Castrol GTX in my bikes.