My 2005 Suzuki Boulevard M50 needs an oil change. What kind of oil do you recommend?

I am having issues with my 2008 Suzuki boulevard m50 my fuel gauge doesn't work and my Neutral light doesn't work and my horn doesn't work I found a blown fuse and replaced it but that didn't fix it I am need of a oil change Suzuki saids to use 10w40 what another oil would work

Look here:


https://www.manualslib.com/products/Suzuki-Boulevard-M50-6021620.html

20w-50 is a good weight.

I personally use is it my Suzuki, and do many others with the bike.

This bike does not have a dipstick to check the oil; Instead there is a sight glass located low on the right side of the crank case. If you look closely at the sight glass, you will see the index marks off to one side of the glass. The bike must be level and horizontal to get a correct reading, NOT on the side stand.

NOOOO! Do not put 20w-40w in the final drive!!!

This bike has hypoid gears (beveled gears that create a sliding action across the teeth and therefore energy loss and a lot of heat). A 20W-40W oil will destroy those gears, it can't handle the high friction in the final drive.

You need an SAE90 Hypoid gear oil with a GL-5 rating as defined by the API (American Petrolium Institute) classification system. If you operate your bike in temperatures less than 32 degrees F (0 degrees C), you will need to use SAE80 GL-5 Hypoid gear oil.

Approximately 3.6 quarts of oil (only 3.2 if not changing the oil filter).

Go here:

http://www.moccsplace.com/

Download the service manual.

Its probably your fuel pump, but the noise should stop after a couple of seconds when its primed. Might want to have it checked.

Great Bike. Suzuki recommends Oil/air change every 6000Klms.(+-3700 miles)
Suggest you blow out air cleaner every 1000 miles.
No adjustment required on drive (Diff), I change the diff oil every 10,000 klm (6000 miles)
As for the rest, it requires no tuning etc, but will required tapped adjustment At +- 12000klm. I would check yours now (8500 miles). There are manuals available on the net.
Obviously check brakes /tires/ oil levels etc
For the rest, keep it clean and enjoy