I first used Nulon when i got the car 18 months ago, then when my oil was changed the mechanic used Valvoline, so since then i have used Valvoline Engine Armour.(people say that sucks)

I have noisy lifters i believe, my engine ticks, but also makes a noise when accelerating, its from the engine im guessing, sounds like something isn't lubricated fully.

Should i put in Penrite HPR, i searched this forum and people tend to like that stuff.

Should i use the 5-40 or 10-50?