I did a quick search on the internet to find out which type of engine oil is best for hot climates and below is what I found:

Here's a three-line table to give you an idea where typical engine oils are used:
Oil type Typically used in....
-5W-30 Cooler climates, like Sweden or Canada
-10W-40 Temperate climates, like England
-15W-50 Hot climates, like Italy, Spain, Egypt

Source: http://www.carbibles.com/viscosity.html

Who should use a synthetic oil? The premium-priced oil is best for:

-Turbocharged or supercharged engines
-Performance or high output engines
-Vehicles used for towing (especially during hot weather)
-Vehicles that are operated in extremely cold or hot climates
-Anyone who wants the ultimate in lubrication and protection

Source: http://autos.yahoo.com/maintain/repa...ques120_1.html

Based on the information from the above sources, for hot climates synthetic oil is recommended over dino oil. Moreover when I tried to find the grade recommended in the S2000 user manual (10W30), I couldn't find it here in Oman. The closest I found was 10W40. I ended up buying Shell Helix Ultra 15W50.

Please let me know if anyone else info on this question.

 

The dealer here in Dubai uses 20W50 Honda motor oil on S2000. May be it is same in Oman. Just check with their parts store you can buy a can from them.

Gaja

 

Gaja, thanks, that is great. I tried to find out from the Honda dealership, but I could not get the competent person on the phone. Plus I think they just use the same stuff that they use for all other Honda models. Today I stopped by a lube shop and all they had was 10W40 Shell oil, so I guess that is a commonly used type of engine oil here in Oman.

Anyway, if your place uses 20W50, then the 15W50 should be okay as well.

 

So what is the ideal synthetic oil to use in very hot weather and for working an engine hard in hot weather?

p.s. thanx for all the research, very informative

 

Based on the above, these two grades for sure: 20W50 and 15W50.

 

The first thing I did when I picked up the S2000 was switch from stock oil to Mobil 1 Synthetic Oil.

1. I knew Synthetics are better for warmer climates and overall engine reliability and,

2. Umair said so - LOL

Cameron

 

where do you get the Mobil from?

 

Hey Asterix,

Trading Enterprises Honda Rashidya has it. I watched him pour the bottles into the car as I wanted to see how to change the oil.

How long are you waiting for the Cayman S?

Cameron

 

Ahhhh.. So you got it from Honda themselves.

I have to wait until November - at least it will be a MY08 specced car though

 

Yup - same here using mobil1 from TE

Asterix, the 2008 Cayman will have Direct Injection like the '08 997? More HP?