Well I've officially got 15k on my truck. At 10k I switched from Castrol (dino) 5w30 to Mobil 1 5w30 full synthetic. Just wanted to report I experienced absolutely no oil consumption at all. I'm a fan of Mobil 1 0w30 but have never run that weight oil in a V8 engine (only a V6 and smaller). My idea was to see if while on the Mobil 5w30 I noticed any oil consumption/leaks as a result of switching from petroleum based oil to full synth. Since all is good, I was thinking to try a 50/50 mix of Mobil 5w30/0w30 (3 quarts each). Then, check for oil consumption/leaks. However, I can't find the 0w30 anymore, just the new 0w20, which I have no intention of trying.

Is Mobil still making 0w30?
and for those on the fence about the switch to full synth related to oil consumption/leaks, I have zero.

 

I saw it not long ago at Target but don't know if they still make it or if it was older stock. I use M1 5w-30 also but was thinking of mixing 2 qts of 15-50 with 4 of 5-30 next time to maybe quiet ocassional roller lifter tick when at normal oper. temps.
I wouldn't use 0w-30 unless I lived waaaay up north. Maybe Exxon-Mobil site has info you need.

 

yeah, they still make it. got some at auto zone the other day.

 

yeah. he's right, it's best to use a higher viscosity in the summer. the lower viscosity oils will drop in oil pressure in hot weather

 

rgr that, I'll try AutoZone tomorrow, thanks.

 

I was under the impression that 0w30 could be used in any application 5w30 was used?
At operating temp they are both still 30 weight oil....please advise further.

 

I put in 10w-30 mobil 1 but I live in the 95 degree, 100% humidity that is the Houston area.

 

I guess my point is: the first number (i.e. 0,5, or 10) relates to the weight of the oil at cold startup and the second number (i.e. 30) relates to the weight of the oil at operating temperatures, hence, multi viscosity.

Is there some disadvantage to running an 0w30 in SoCal then?

 

Info:

Product Description
Mobil 1 0W-30 is the most advanced performance synthetic engine oil designed to provide the cleaning power, wear protection and enhanced fuel economy performance. Mobil 1 0W-30, Enhanced Fuel Economy Formula, exceeds the requirements of the latest industry standards required by newer modern gasoline and diesel powered automobile engines. The Mobil 1 technology is race proven and is the choice of race car drivers around the world. Mobil 1 0W-30 is perfect for all types of driving anywhere in the world and has the performance to protect where conventional engine oils do not.

Features & Benefits
Mobil 1 0W-30 is made with a proprietary blend of ultra high performance synthetic basestocks fortified with Supersyn Antiwear Technology, the most advanced additive system available today. Mobil 1 0W-30, enhanced fuel economy formula, is uniquely designed to provide unsurpassed levels of protection, especially at start-up in the coldest environments for reduced engine wear. The oil meets all of the industry standards for fuel economy, helping to save fuel and reducing CO2 exhaust emissions. Key features and benefits include:


Features
Advantages and Potential Benefits
Active cleaning agents Prevents deposits and sludge build-up to enable long and clean engine life
Outstanding thermal and oxidation stability Reduces oil ageing allowing extended drain interval protection
Low oil consumption Less hydrocarbon pollution
Enhanced frictional properties Greater fuel economy
Excellent low temperature capabilities Quick cold weather starting and fast protection
Extended engine and electrical system life
High Viscosity Index and Supersyn Antiwear Technology Excellent overall lubrication and wear protection performance for all driving styles and conditions

Applications
Mobil 1 0W-30 is recommended for all types of modern vehicles, including high-performance turbo-charged, supercharged gasoline and diesel multi-valve fuel injected engines found in passenger cars, SUVs, light vans and trucks.
Mobil 1 0W-30 is especially suitable for extreme conditions, where conventional oil often cannot perform.

 

Tech info:

Typical Properties
Filling RN 4677 AAAC
Mobil 1 0W-30
SAE Grade 0W-30
Viscosity, ASTM D 445
cSt @ 40º C 56
cSt @ 100ºC 10.3
Viscosity Index, ASTM D 2270 175
Sulfated Ash, wt%, ASTM D 874 1.2
HTHS Viscosity, mPa·s @ 150º C, ASTM D 4683 2.99
Pour Point, ºC, ASTM D 97 -54
Flash Point, ºC, ASTM D 92 234
Density @15º C kg/l, ASTM D 4052 0.851