Oil viscosity

Hi All,

 I just wanted to check everyones opinion on this- My Haynes manual quotes I should use quite a thick oil- 15w-50 oil but I have used a 15w-40 oil in a recent change. Most folks on here seem to be using either 10w-40 or 15w-40 but I'm a bit worried this oil will be too thin when it reaches 100 degrees temp.

 What do you all think?

 cheers

 Mark.

It won't be too thin.

Hi Paul

 Thanks for quick response ( as my brain is whirring away that I've bought the wrong oil and wasted money. )
 
 was just a bit worried as I have read oil can "shear" it's molecules at high temp and coke up. Was also starting to think the over thinning would lead to engine wear.

 Thanks,

 Mark