With that in mind, the manual states to use either 10w40 or 10w30. I am going with 10w30 synthetic (Castrol). I am in FL, so it can get hot and humid down here.

As an aside, are the K&N oil filters better than the factory LR oil filters? I have a box of LR oil filters (my step father used to own a mech shop and I opened an account at the local LR dealer at the time so I could get parts at shop cost).

 

In Florida, run 10W/40 year around, you would be better off.
Yes, both the K&N 3001 and the Mobil1-301 are both better and larger then the factory filters.

 

Mike,
Will running 10w30 cause any potential issues? I already dropped some pocket on 15 quarts of 10w30 Castrol synthetic. I can always run through this oil and switch to 10w40 synthetic.

Thanks

 

I switched to 0w30 Mobil 1 and noticed my engine is much quieter at startup to operating temperature. It leaks a few drops, but no puddles under the Rover. In the summer I'll run 0w40 Mobil 1.

Before anyone replies with 'that oil there is too thin' please think first. Once up to operating temperature it is just the same as any other 30 weight oil. The oil viscosity does not correlate to the oil film strength either. Thicker oil does not necessarily protect better.

Cheers,

Pete

 

A Xw-30 motor oil only protects tp 95*F. Xw-40 Xw-50 protects upto 120*F.
Meaning that if it is hotter than 95* in the afternoon when you leave work the oil is going to break down faster.
Living in FL I would use either 15w-40 or 15w-50.
Use up what you have, as for the oil filters, the LR filters are just fine.

 

Everyone,
Thank you for the feedback.

I'll use up the 10w30 synthetic and switch over to 10w40 synthetic.

Thanks again.