CastrolPower1 4T 10W-50 Full Synthetic Motorcycle Oil, 1 Quart, Pack of 6

Bike runs smooth. Good oil I noticed that the newer version is rated at api sn vs the previous was api sl.

Good oil at a great price.

Castrol Power1 4T 10W-50 Full Synthetic Motorcycle Oil is a premium lubricant that is designed to meet the demanding needs of high-performance motorcycles. This oil is formulated with advanced synthetic base oils and Castrol's proprietary Trizone Technology, which provides superior protection for the engine, clutch, and gearbox.Castrol Power1 4T 10W-50 is a shear-stable oil that maintains its viscosity under extreme conditions. This helps to ensure that the engine is always properly lubricated, even when riding at high speeds or in hot weather. The oil also has excellent anti-wear properties that help to reduce friction and wear on engine components.In addition to its outstanding performance, Castrol Power1 4T 10W-50 is also a very clean-burning oil. This helps to reduce the build-up of deposits in the engine, which can lead to reduced power and performance. The oil also has excellent anti-corrosion properties that help to protect engine components from rust and corrosion.Overall, Castrol Power1 4T 10W-50 Full Synthetic Motorcycle Oil is a premium lubricant that offers outstanding performance and protection for high-performance motorcycles. This oil is a great choice for riders who demand the best possible protection for their engines.Pros:Formulated with advanced synthetic base oilsCastrol's proprietary Trizone Technology provides superior protection for the engine, clutch, and gearboxShear-stable oil that maintains its viscosity under extreme conditionsExcellent anti-wear propertiesClean-burning oil that helps to reduce the build-up of deposits in the engineExcellent anti-corrosion propertiesCons:None

At first I was debating between Castrol and MobilI went with Castrol, the oil seems to be good and i feel the engine run smooth although I would actually know how the oil performs after putting a few hundred miles on it for now it seems to be doing its job and minimizing engine noise. Would recommend it hands down

This is the only oil I use when it's time for a scheduled change and iv'e used this brand for many years. Fully synthetic as recommended by the manufacturer. I highly recommend Castrol Power 1 to meet or exceed your motorcycle requirements.

This Castrol product is the recommended lubricant for my Italian motorcycle. Of course , there are other motorcycles & motorcyclist that use this product too. I have NOT heard any complaints about the oil and buying it online saved money & time for me. I will buy it again when needed.

Seems to be okay. Engine runs smoother etc.I have to use for awhile to fully test out.Ask me in six months.Oil: Castrol: Power RS V-Twin 4T 20-50 Full Synthetic:Story: Since purchasing used a year ago with about 13,500 miles I have only used the Kawasaki Red label 10-40 oil, of which the previous owner had used. With the cost of oil changes and recommended from others to try a synthetic oil. Doing research on the internet as I am a Pennzoil lover from years back, however I researched Castrol and decided that it appeared they had the best development and etc. of oils. I just a couple months ago put Castrol in my pickup. With very hot climate here in Arizona I thought that I needed the extra protection and going to a 20-50 as other riders in Arizona use. Following maintenance record.Oil start up and performance:After installation of the new Castrol oil and new KN filter. I started bike ran for a minute and shut down. I let it set for five minutes, then started again. It still rattled a bit louder then normal but left it run the more it ran the more quite it got. I left it run for about fifteen minutes and it really got smooth running and nothing rattling.Putting the VN 2000 in perspective: 2053 cc, 125 cu in, 116 hp. 103MM (better then 4 in diameter x about 5 in stroke piston) or 62.5 cu in per piston / or 62.5 / 61.03 cu in in a liter = 1.02 liter. 141 ft lb of torque @ 3000 rpm.Now lets compare to what we are used to: Most probably the most powerful muscle car of that era was the Dodge 440 magmum: 440 cu in or 7.2 liter, 375 hp @ 4600 rpm, 480 ft. torque @ 3200 rpm, with a: 4.32 inch piston with a 3.75 in stroke. Curb weight 3770 lbs.I figure my bike with the trailer hitch and other items wet weight maybe 900 lb.In perspective: 2 cylinders x 4= so: 125 cu in = 500 cu in, or 8.16 liter, 141 x4= 564 ft lb of torque, 116x4=464 hp. That is more torque then a lot of hyper charged Dodge Cummins pickups pulling big trailers.By weight you have a bike that is: 60 cu in larger, 84 ft. lb of more torque, 90 hp more then the Dodge charger with a 440 magnum. You should have the picture now. The most powerful street cruiser made.After a 2-3 days of riding brief short trips to the grocery store etc..Test ride # 1: OilCruising south on Higley to the 60 right turn, about 15 mph, pour it on a slight bark then smooth, gear two, shifter slides in smooth as silk. Give her more gear three, didn't even feel it shift, gear four no click it just went there, gear five the same, trottle full the engine just kept going, running so smooth unbelievable, what the heck I didn't know this had a automatic transmission. At the end of the ramp I looked down I was going 117 mph. Tire review to follow later. After going maybe 8 miles west on the 60 at varying speeds. I turned off the 60. Up to the stop sign I let her settle down and every time now. Back completely off the throttle and she just sits there a very slow rpm guessing about 200 rpm (there is no tachometer) less then with other oil. Those big four inch pistons just sit there thump, thump, thump, green light, very little to the throttle 5 seconds of good barks and she smooths right out with a steady easy rumble. I pull up to stop sign and a loud sounding Harley is in the lane next to me, and the rider wonders what that thump, thump, thump is! I am guessing he thinks I am going to blow him away with sound after the green light. Sorry only five seconds.Analysis: I am guessing that the ECU is sending a signal that there is less power is needed because everything is running so smoothly because of the oil. Now because of going to the 20-50 weight I will purposely just let it idle longer on start up to make sure that I have good oil circulation and coating before I take off. The shifting (same oil works in the transmission) is so smooth, I don't hear one click and very little pressure.