Oil

I grew up on 10-30 or 20-40. This is SoCal. No freezing, lots of heat.
Synth oil is nice, but expensive. The concept of 0-20 oil, although
the manufacturer suggests/demands it, is just alien. We never freeze,
we just have to worry about the oil thinning out when the ambient is
over 100F.
I assume I'm worrying needlessly now, but I'd like to know why.
Reply to
The Real Bev
m6onz5a wrote in news: snipped-for-privacy@googlegroups.com:
sorry but its strictly to meet gas milage specs. I wont use 0 anything unless its dam cold out. or the very select few that need it to run special valve timeing stuff that need a specific oil to function. KB
Reply to
Kevin Bottorff
I am more worried about the viscosity range: why do German "luxury/performace" cars need 0W40 oils? That is expensive crap.
Reply to
conrrrod
Extremely low friction requirements.
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Higher viscosity oil (10W-60) delivers higher thermal stability where as lower viscosity oil (5W-40) minimises fuel consumption and emissions by reducing the energy required to circulate the oil. The correct viscosity is specified by the manufacturer and is designed to optimise the efficiency, performance and life of the engine.
For example;
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SYNTHOIL LONGTIME PLUS | 0W-30
Special development for VW, Audi, SEAT and SKODA petrol and diesel vehicles with service interval extension (also pump jet engines). The fully synthetic low-viscosity motor oil from the Longlife 2 generation keeps the engine perfectly clean. Exceeds the high Volkswagen test requirements. Reduces fuel consumption in one of the toughest consumption tests in Europe (CEC-L-54-T-96/ MB M 111) by more than 2.5% as compared with the specified reference oil. Fast cold-start oiling provides excellent engine wear protection during the start and warm-up phase.
Intended use All-year oil for petrol and diesel engines with and without pump-jet technology. Specially developed for vehicles with service interval extension (German abbreviation: WIV) from Audi, Volkswagen, Seat, Skoda. Tested safe with catalytic converters and turbochargers.
Reply to
Xeno
Pretty much. There are critical additives in these oils for other specific purposes as well. Deviate from Mfr's specs at your peril.
Reply to
Xeno
No problem. But I really want to know why 40-weight oil was a proper choice in HOT weather (80mph on a slight uphill across the Mojave in August, for example) a while back but now isn't even an option.
Reply to
The Real Bev
Likely someone could make a 40-weight oil with the correct additive pack for that engine, but nobody does, because it would be of very limited use. There aren't a lot of people in the Mojave at any given time.
They make the oil that is usable over the widest possible applications with the correct additive pack. --scott
Reply to
Scott Dorsey
HAH. Look at the traffic on I-210, I-10 and I-15 between LA and Las Vegas on a Friday afternoon!
Reply to
The Real Bev

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