I am using Castrol Syntec 5w50 now...can i actually use this oil??

or i should have use the 5w30 one??

 

Ideally, oil should be thin enough to flow easily when an engine is cold and remain thick enough to protect an engine when it’s hot. Automakers specify grades according to the temperature range expected over the oil-change period. The lower the number, the thinner the oil and the more easily it flows.

In 5W-30 oil, for example, the two numbers mean it’s a “multiviscosity” or “multigrade” oil that’s effective over a range of temperatures. The first number, 5, is an index that refers to how the oil flows at low temperatures. The second number, 30, refers to how the oil flows at high temperatures. The W designation means the oil can be used in winter.

A popular belief is that 5W-30 oils, despite their designation, are too thin to protect vital engine parts when they get hot. However, laboratory tests measured the viscosity of oils under high-temperature, high-stress conditions and found essentially no difference between 5W-30 oils and their 10W-30 brand mates. But at low temperatures, the 5W-30 oil flowed more easily.

I live in a very hot climate and I only use 5W-30 oil. There is no need for you to use a 50 weight viscosity oil being from Canada. 5W-30 is good for all climates.

 

hi kid..5W~50W is too thick for cls..or non turbo cars.those are for high temp engine cars or high mileage cars.(as the temp is high, oil still can manage to lubricate the parts)....i think 5W~30W or 10W~30W will just fine for our cars....i use mobil 1 full syn 5W~30W lol...
keep in touch kid

 

I've used 5W~30W Mobil 1 synt and 10W~30W Havoline in my CL-S and to tell you the truth I didn't see any difference.

 

that's not that much of a difference as compaird to 5w- 50. you might not feel a difference, but ur engine will.

 

so i should just switch back to 5w30 right??

thanks a lot guys..

 

yah.kid..use 5W~30W

 

if u didn't know, the corvette gained like 15 hp from using synthetic in every moving part. ie. motor, tranny, rear end

 

But note this was at high rev's. In daily driving you won't get HP benifits but you will get increased life due to less wear and better heat removal.