5W-30 ALL SUMMER

[mossad]

This year I didn't go to the 10w30 as I normally do during the hot summer months, instead, I stuck with 5/30.

Both vehicles I own recommend 5w30 but on their temp chart, they say I can use 10/30 anywhere above zero degrees, only that 5w30 is preferred.

Are most SM rated 5w30's holding up just fine during the mid 90 degree hot and humid days of summer? Or should I really be going to the 10/30 during those times?

 

[jagwire]

http://63.240.161.99/motoroil/

 

[ToyotaNSaturn]

mossad, any SL-rated or newer oil will hold up in the heat. That goes for 20wt oils thru 50wt oils (all of them). Today's technologies are far and away better than the SF oils of not that long ago.

From personal experience, I've used Pennzoil 5w-20 in our Vue and the old Saturn in the hottest parts of the summer here (which is June thru August with every single day in the 90's) without issue.

 

[Bryanccfshr]

Many triple digit days and 5w30 all summer..never batted an eye.

 

[schwartr88]

Valvoline maxlife 5w30 all summer and still going stong.

 

[Curious Kid]

If having added some Xw-20 oil to the 5w30, one might have noticed drops in oil level...as it appearently was passing the rings and burning-up in my case. Had used HM 5w30. I to use to do the switch.

Have learned much and shall continue to here at the BITOG!

 

[427Z06]

44 days of 100 plus temps so far this summer and 5w20s and 5w30s are holding up just fine. And we normally see 4 months of 90 plus temps too.

 

[Bill in Utah]

Run Conventional 5w30 all year long (20 below to 120 above in the desert) with no worries.

UOAs and long life engines prove it works.

Take care, bill

 

[bottgers]

I run 5W-20 in our MPV and 5w30 in my Corolla year 'round without a hitch.

 

[RogerKlugerAus05]

I use 10w30 here in Australia, Mobil 1, in my Toyota Kluger(Highlander) and Corolla Wagon all year in temps up to 45 C in summer. Would use Mobil 1 5w30 if it were available.
Roger

 

[Al]

5w30 conventional oil shears back from 10 cSt to 8.5 cSt after 1500 miles or so. It doesn't seem to matter though with regards to wear.

 

[ARB1977]

Im looking to get alittle boost with fuel economy thats why im leaning towards Amsoil Series 2000. 0W30 here in Texas has no problem to handle the heat. I think what draws some away is that they see 0W and dont realize that its still a 30 at operating temps. I guess you get the best of both worlds here.

 

[Ray H]

When ambient temperatures top 90 degrees, there's little cold-start viscosity difference between a 10w30 and a 5w30. In my climate, I prefer the lower VII polymer content of 10w30 year 'round.

 

[toyota62]

Fuchs Titan GT1 0w-20 in 42c'+ summer

 

[RogerKlugerAus05]

Toyota62
If I used Fuchs 0W-20 in my 2 Toyotas, still under warranty, I think I would be in trouble if I were to make a claim under warranty! I have never seen that oil for sale here, not that I would use it. I trust my Mobil 1, and when I use up my stash of 10w30 I will try and get some bulk 5w30 which I believe is available from distributors.
Roger

 

[toyota62]

Call Fuchs Australia they will tell you where to buy Fuchs titan GT1 0w-20.If you stay with Toyotas recommended oil change interval there are wont be a problem.I think there are two service options for Toyotas either 7500km or 15000km.Choose 15000km service interval if you use synthetic engine oil.

 

[Chris Meutsch]

Your first number, which you seem to be worried about, is never the issue in my opinion. The lower the number, the faster it flows (Scienticians, post your rebuttals here). The back end number is the one you need to concern yourself with if I know my oil correctly. A 0w30 would be acceptable for you IMHO.

 

[mechtech2]

Right. Once it's hot, 0-30, 5-30 or 10-30 are the same. OK, there can be slight differences either way.
The lower first # is good for flow and low temps.
A lower first # is always more desirable.

 

[rikstaker]

Temps upto 45c-Saudi Arabia-

Conditions my NBP Civic Sedan 2006 is put to:

Heavy raffic driving,dust,stop & go-short-trips & some 160 km/hr long distance cruising.

Fuchs TITAN supersyn 5w30 keeps things super smooth.