oldguytsxer

What would be the advantages or disadvantages?

Owners manual calls for 5w30 in colder climates and year round, 10 w30 in hot weather.

5w30 obviously a little thinner oil.

Mileage a little better with thinner product?


Thank you in advance

curls

I'm fairly certain our cars always take 5w30 year round.

I run a 0w30 year round (full synthetic) here, no problems.

You will get a TON of great answers on www.bobistheoilguy.com if you look at their forums, too. But in short, you will be fine with both a dino (non-synthetic) 5w30 year round, with conservative change intervals. Or, go with a 0w30 or 5w30 synthetic with slightly longer change intervals.

Synthetics tend to resist breakdown better than dino oils, thus they can normally be run longer between oil changes, but the drawback is increased cost.

Both 0w30, 5w30, and 10w30 are all the same general thickness (30) at operating temperature, so their mileage should be roughly the same. The first number is the "winter" (hence "w") thickness -- thinner is better for cold morning starts. The second number is "summer" or operating temperature thickness... thinner is better for mielage but sometimes too thin can cause problems such as increased wear.

Go with 5w30 dino or syn, IMO...

fdl

5w30 is fine , but if its gets extremely hot where you are, 10w30 is better. Similarly 10w30 is fine , unless it gets extremely cold. Its only in those extreme conditions where you need to worry.

zidenx

iTrader: (1)

yup, i use 5w30 during the winter and 10w30 during the summer. mobil 1 synthetic only.

Ellas9

I'll run 5W30 for the year with the exception of the coldest winter months where I will move to Synthetic 5W30. Castrol for the conventional and Mobil 1 for the synthetic. To be honest, I've never seen the manual say you could use 10W30 though - maybe I've got the Canadian version.

SodaLuvr

5w30 will flow better than 10w30 at sub-zero temps, but otherwise, the differences are minimal at best.

Viscosity stability, IMO, with 5w30 and 10w30 should be near identical.

drunkenbuda

I do 5w30 all year round, been good to me. I don't see the need to change it winter or summer.

pizzaman555

I accidently put 10W30 in my car and its fine.

zidenx

iTrader: (1)

uhm.. i read somewhere that it's not a good idea to switch back and forth with synthetic and regular oil... once you go synthetic, you have to stay synthetic.

SodaLuvr

Can switch back and forth at any time....

Call up Shell or ExxonMobil and they'll tell you this.