Brandon Lam

https://streamable.com/0hadw6

Thanks for the input everyone!

cosmomiller

I would question any shop that said to go for a higher weight oil because of the absence of "cold weather". When the engine is at operating temperature, the viscosity of the added oil will not change; not a whit if you are driving in Death Valley or Montreal Canada. The first number, is the ambient or cold weather viscosity. This is what you have when you first sit down and start the car. You generally want a low number as possible to make starting easier and have faster lubrication. The other number is the viscosity after arriving at operating temp. In our car, in the USA, 30W is what is called for.

You may prefer a synthetic over dino, that is fine. Lots of threads on the "best oil" to use.

Slowcrash_101

A 40wt oil is fine apparently. It says so in the manual, either 10w-30 or 5w-40 a 30wt oil is 10cst at 100c a 40wt oil is 12cst at 100c. There's 0w30s that are 12.2cst @ 100c is this oil incompatible? Clearly not or people would be blowing engines left and right with euro Castrol 0w30. Some 30wt oils shear down to a 20wt and people leave the oil in and it still protects as shown by several UOAs.

I don't think it makes a difference if you use 30 or 40wt oil in this engine. Maybe an unnoticeable improvement in fuel economy if you go for a thinner oil? You can get the same benefit from driving slower in your sports car, but then if you're worried about fuel economy you wouldn't be driving a sport's car.

I will say this, I believe Honda wants a 10w30 because it plays nicer with the TCT, than a 5w30, during hot starts anyway.

Chuck S

Details, please. When the oil is hot 0W-30, 5W-30, and 10W-30 should all be at their 30-grade viscosity.

-- Chuck

Billman250

Not even close.

Car is fine, no abnormal noises in the video.

Slowcrash_101

and different oil manufacturers have different viscosities for their 0, 5 and 10w 30s. And the viscosity of an oil follows a curve, it will have x viscosity at x temperature, which isn't necessarily the temperature your oil operates at in your engine. On some cars oil temp is 190, on others it's 230.

Remember that a 10w 30 measures ~10cst at 100°c it doesn't show you how the viscosity changes as a result of temperature. It could work like another manufacturer's 20wt at 110°c where another may still behave like a 30wt or even 40wt at 120°c

cosmomiller

I brought up the viscosity not for viscosity sake but the REASON the shop wanted to go to 40W was weather related. To me, some shop guy who thinks that way is suspect in my mind. We are not in the late 40s talking about driving an Oldsmobile Rocket 88 in Minnesota.

windhund116

I'm not quite catching your logic. The ratings of the oil's viscosity is done in a lab, right? How would someone compensate for real-world conditions?

Pinky

Nothing abnormal. Only thing you might check would be the tensioner pulley bearing. If you get the belt off and give it a spin and it makes noise then that's the noise that you might be hearing. Other than that normal.

Chuck S

Good idea. Removing the belt takes maybe 30 seconds including opening the hood. Spin the pulleys by hand noting noise/wobble. You can also run the engine momentarily without the belt and listen for noise changes. Replacement bearings are available. While in there check the belt tension marks. Best replacement is the OEM belt.

-- Chuck