oil type for Southern California climate

Messages
119
Location
California
I was reading a post about 10W-30 being a good oil for Texas. Well, how about California? We've got some hot summers here. I also live in the mountains where the winters means snow and ice (below freezing, but not by much). My manual recommends 10W-30. I have 150,000 miles. What should I use? I was thinking about Mobil 1 10W-30. (I am aware of the risk of leaking seals) What do you guys think? Also, is it safe to use oil different from what the manufacturer recommends for the engine?
 
Messages
12,385
Location
Northern CA
10W-xx is a no brainer good visc0sity for winter temps that don't get much below freezing. The oil leaks when switching to synthetic were mostly in the early days of synthetic. There isn't much risk now. As far as using an oil different from what the car manufacturer specifed, please be more specific. What did they specify and how different?
 
Messages
231
Location
So Cal
I just started using Mobil 1 0w-40 (in a motor that calls for 10w-30) and I am very happy with it so far. I live 5 miles from Willow Springs Race Way, so I know about HOT! [Big Grin] Mobil 1 0w-40 might work great for you as well, it sure seems to cover all the bases in terms of start-up flow and high temp protection. Darryl [Patriot] [ March 24, 2004, 06:07 PM: Message edited by: Darryl ]
 
Messages
1,488
Location
Los Angeles
What kind of car do you have? Mobil 1 10w-30 might be too thin. You might be better off with GC, Amsoil, Redline, or Mobil 1 0w-40.
 

kansaisubaru

Thread starter
Messages
119
Location
California
I have a 1995 Subaru Impreza with a 2.2 litre boxer engine. Specified by Subaru is 10W-30 or 5W-30 (for below freezing temps). I was thinking about M1 10W-30. I also change the oil in a 1996 Chevy Corsica with a 3.1 V6. Chevy recommends 5W-30 for this engine. I've heard suggestions to switch to 10W-40 because of the mileage (about 110,000 miles). What do you guys think?
 
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13,132
Location
By Detroit
quote:
Originally posted by XS650: If your engine has started using more oil or is making more noise, then consider a higher viscosity oil because of wear. Or consider higher viscosity oil if your oil temperatures are running higher than recommended because of a hot climate, hard driving, towing or ???.
I would assume if an oil pressure gauge shows below specification oil pressure, one might want to move to a higer grade.
 
Messages
12,385
Location
Northern CA
quote:
Originally posted by TallPaul: I would assume if an oil pressure gauge shows below specification oil pressure, one might want to move to a higer grade.
If the gauge were accurate and there weren't another problems causing the low oil pressure.
 
Messages
13,132
Location
By Detroit
quote:
Originally posted by XS650: If the gauge were accurate and there weren't another problems causing the low oil pressure.
True. But, slightly loose bearings leaking oil also would warrant a tad thicker oil. Perhaps one area where caution would be warranted is if the low pressure is caused by a weak spring in the oil pressure relief valve.
 
Messages
137
Location
los angeles
I live in L.A. and I just use the recommended 5w-30 for my car. I'm using Mobil 1 and the bottle says it will protect up to 400 degrees, I doubt the oil will get that hot very often so I think there should be no problem. I'm having an oil analysis done in 2k more miles so I'll post the results when I get them back in.
 
Messages
1,836
Location
Pac NW
Delo 15W-40 or Pennzoil LongLife 15W-40 in the Subaru [Burnout] Cold temp starts are not your problem, when you drive to Arizona you'll appreciate the extra protection. Your engine will stay clean & it costs about $6 per gallon, or thereabouts [Cool]
 
Messages
12,385
Location
Northern CA
quote:
Originally posted by kansaisubaru: I've heard suggestions to switch to 10W-40 because of the mileage (about 110,000 miles). What do you guys think?
Changing to a higher viscosity because of engine mileage alone, without any indications of wear is nonsense. I've seen engines where the cylinder bores and bearings still met dimensional specs for anew engine at 150,000 miles If your engine has started using more oil or is making more noise, then consider a higher viscosity oil because of wear. Or consider higher viscosity oil if your oil temperatures are running higher than recommended because of a hot climate, hard driving, towing or ???.
 
Messages
3,118
Location
San Antonio, TX
I have another question to add to this thread. Is GTX good for this climate in the summer? Does it hold it's FP and anti-foaming properties for 4500 - 5000 miles?
 
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