Usually a good idea to go to a thicker oil in the colder months right? Or am I thinking backwards on that.

 

Typically, you want to run lighter viscosity oil in the winter months - this makes the engine easier to start in colder climates. I had some 20w50 in a car some years ago and we encountered a very cold winter one year. The car would not start due to the thick oil and a marginal battery.

 

Ok so I got a better video of sound. Kind of sounds like it's coming from the exhaust but I don't know.... possibly torque converter. Truck is in park when video is taken.

 

Here is what I would do, get under there when everything is cool and start shaking sh*t. Exhaust, tranny, whatever. How is your exhaust setup? I noticed your y pipe is 4 separate pipes correct?

 

​​​​​​No, 2 piece y pipe. It's all welded. What do you suspect? The truck is catless, I have a look alike cat on there.

 

You could remove the converter inspection cover and see if you have a cracked flex plate or loose converter bolts. You could also get a stethoscope to help you pin point the noise. Or you could just wait until it becomes much more apparent, although its usually better to catch stuff earlier.

 

That sounds like exhaust or a loser heat shield (metal stuff on the floor)

 

No, thicker in summer, thinner in winter. I used to go back to 10w30 in winter if I was traveling to MN but usually I run 10w40. My truck has always burned a couple quarts so a little thicker always helps that. Just know that thicker oil may cause a little more valvetrain noise. As engines grow older, thicker is best to use. Old timers would use straight 30 or even 40 as components wear out. But with the invention of multi-viscosity oils, better refinement, and longer lasting engines, that practice has gone away. Look at new engines, they use 5-20 or 0-20 which is like water. But these are very old engines and you can just about put anything in them.

 

it does for sure. I just don't see anything that could be vibrating. And why would it stop Midway through that video?

 

Rather than starting another thread, if I was to swap my 318 out for a 360 stroked out to a 408, what other parts would I need to make it work?