5w-20

I just changed the oil in my cobra and I used Royal Purple. I've never used RP, but I am using the same viscosity as the last oil change (5W-20). When I was pouring it into the funnel, I noticed that it appeared to flow faster, as if it was thinner. Has anyone else ever noticed this? I haven't...

Ever since it came out i have been running Mobil 1 Fully Synthetic 5w-30 in all of my cars. i have had my 03 cobra for about 2 years and some change... my question is what is the best oil and viscosity for our cobras? I heard that 5w-20 is better? is that true thanks :beer::beer::beer: