Castrol GTX 20W-50 Conventional Motor Oil, 5 Quarts

I originally bought synthetic oil and found out later I needed conventional oil instead. Anyway this worked out for my needs.

Used this in my hydro gear oil change

Buen aceite

i'm really happy that I can still get this oil. It's a recommended oil for my 1965 Rolls-Royce and it's all I use in my vehicle. My engine runs quite well with this oil

I was on the way to the vet with a very sick baby with my truck decided to overheat. She maxed out on the temperature gauge and boiling water was spewing. I just knew my truck was going to be blown up. She cut off a few times along the way with me stopping trying to put water in it, and it just pouring back out as soon as I took the cap off it looked like a volcano Erupting. I truly believe if it was not for the oil in my motor and this oil in my motor, it would have been blown up. Thank you Castro for always being there for me and my cars.

If you are at 100,000 or more miles on your V-8 5.3l Vortec engine, you better go to 10w-40 and then to 20w-50 at some point. The 5w-30 OEM recommended viscosity is not going to hold up. These will quiet that engine down and run like a champion. I have a 2007 GMC Sierra 5.3l vortec. Switched to 10w-40 in 2010. Been with that the last 10 years. Just switched to 20w-50 last year; quiet, smooth, and powerful. I use the bigger oil filter like the ecotecs call for, AC Delco PF-63 or equivalent e.g. Champion/LuberFiner PH10063, more flow and more oil, less start up tapping. I don't hear any piston slap either. 165,000 miles on engine and still running strong! So, December thru February it's 10w-40. March thru November it's 20w-50. We live in SE North Carolina, so the heat is conducive for the thicker oil. If I lived far up north like Connecticut or so, then I would use 5Water-30 in the winter, but we don't so this is the far better solution!

Castrol Oil, one of the best vehicle oils ever made. I`ve been using Castrol oil since the early 80`s.Thank you Amazon.

Good value