Nope. It's a myth that fossil and synth can't be interchanged. Synthetic is basically a cloned version of the long-chain hydrocarbon (and the usual soluble detergent additives) that is a superior lubricant and heatexchanger. Feel free to go back and forth between fossil-based and synthetic oils.

 

Thirdup, you can change to synthetic at any time. I now run Mobil 1 15/50 in my classic Triumphs, after years of running Castrol dino oil, which is what was recomended at their time of manufacture. As I do not ride them often, I was most interested in the long term "clingability to parts" that synthetics excel at.

You will have a little residual dino oil left the first time you run it, which will mix right in, and be eliminated the next time you change.

 

The V&H 2-into-1's look beautiful. The bike runs perfectly. The pipes have a deep resonant sound that is great. Everyone seems to like the sound, except for the wife. She says, "you spent how much, just to make it louder?" Oh well, you can't please everyone. Basically I'm very happy. If we go on a long trip, I may need to find a way to tone them down a bit. A couple of the techs in the shop (including the service manager) want to switch to them after they heard the sound.

 

is your bike stock? if so the heat is caused by the bike running so lean. best way to cure that is with a fuel managment system, sert, pc111.....pipes and a higher flow aircleaner, basically a stage 1 upgrade. running synthetic oil is a good idea i swithched to syn 3 and noticed a small improvement in shifting then swiched to amsoil and noticed a bigger impovement in shifting.

 

I doubt if Syn3 is junk, as some say, but you could do much better for your money, IMO. There are some very good oils available, including Mobil 1, Royal Purple, Amsoil, and Redline, to name a few--and most cost less than $10/qt. (Syn3). Yes, a high-quality synthetic will lower your engine temperatures, will resist oxidation (sludge) better, will extend your drain intervals, and is a better overall choice. Pick from among the usual suspects depending on price and availability in your area. You can hardly go wrong with any of them, and don't eschew Mobil 1 15w50 or any other "car oil" manufactured by this group, all of which cost much less than their motorcycle-specific variants.

 

"Better" than Syn3, I assume you mean. Yes, I think it is, as is Mobil 1, Royal Purple, Redline, and likely a host of other synthetics on the market. "Better" is relative, and no oil is "better" or "best" in all categories. Reference tests run by Motorcycle Consumer News, American Iron, and Quick Throttle magazines for evidence of this.

 

I dumped my syn3 after hearing so many bad things about it. using Mobil 1 20w50 eng, 75w90 trans and HD P+1 in primary.

 

I would suspect that all synthetics work very well. I just object to HD dealers charging $11+ a quart for theirs. Plus I can buy Amsoil for $6 a quart. And let it be known that all syns are NOT 25,000 mile oils. Some are actually designed to be changed at 5000 miles. Amsoil sells a 25,000 version and another that requires much earlier changes. I just ordered $400 worth of the stuff for my bike, cars and my company trucks. And I always ask for the 25,000 mile stuff. Be sure you do to.
Gary

 

Hard to say which is better than the other. For me, having the oil and filter delivered to my door was the selling point. Changing everything i have to Amsoil.

 

Don't use SYN 3 when you do research on oils you will find it's not a top of the line oil. There are many other better oils that can be used. I myself use AMSOIL 20w50 in the engine and primary and 75-110 Severe gear in the transmission.