I'd probably use 5W30 instead of 10W30 if I was up there. Here in Wisconsin
the past couple weeks we've seen temperatures dipping below 0 F and we have
a car with 10W30 that had a bit of a problem starting.
5W-30 -25 degrees C Provides excellent fuel economy and low
temperature performance in most late model automobiles. Recommended for
non-turbocharged engines. Especially recommended for new cars.
10W-30 -20 degrees C Most frequently recommended viscosity grade for
most automobile engines, including high performance multi-valve engines and
For both engines, the official advice seems to be that 10W30 is recommended,
but 5W30 may be used in temperatures of 16 degrees C or lower. For extreme
cold conditions, 0W30 conventional or 5W30 synthetic are recommended.
Robert Hancock Saskatoon, SK, Canada
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I would use 0W30 Mobile 1 oil here in Ontario instead of 5W30 or 10W30.
0W30 (from specification) is far more better than 5W30 or 10W30 both on cold
and hot temperature. Unfortunately, I can seem to find it here. Does
anyone know where I can get 0W30 Mobile 1 oil in Ontario?
I really don't see what the difference is. The viscosity for both types
go up as the engine gets warm. At cold temperatures the 5W30 still has
higher viscosity than the 10W30 does when it is hot. Oil always gets
thinner as it warms up. The 5W30 just does not get as thick as the
10W30 when cold. I have used 0W30 synthetic in warm weather.
I have yet to find a lubrication engineer who can give a good reason for
not using 0W30 even in warm climates.
You want to be sure to use synthetics that do not use VI to achieve the
wide viscosity range.
multi-grade oils use microscopic plastic additives shaped like tiny coils to
give you the two different grades of oil viscosity. as the oils warms up,
the coils expand, thickening the oil to the higher viscosity on the
container's label. larger viscosity differences require more of these
additives, so you want as little as you can get away with, because these
impurities are part of what causes the oil to break down over time and need
to be replaced.
bottom line: don't use 0w40 in summer when you don't need to.
yofa - firstname.lastname@example.org
Note the grades on the left side of the display. They have 0W20, 0W30
and 0W40. I have seen and used only 0W30 and got it at WalMart. It is
normally a bit more expensive (than 5W30) so I usually use 5W30.
Another note: A several years ago I went to change the oil in my lawn
mower. Straight 30 weight is recommended. After draining I found I had
only 5W30 Mobil 1. I put it in and the mower ran better than ever
before. It is still running great, even with it's original plug. I
pulled the heads a while ago and there was no carbon build up. I now
also use Mobil 1 in my Snow Blower. My opinion is that those little air
cooled engines run extremely hot. That is where synthetics really pay
off. From what I have read conventional oils began to break down at
about 350 degrees. Synthetics are stable up to 700 and above.
Watch out using synthetics in small engines. It can void the warranty on
some. I believe it is Tecumseh that tells you not to use them in their
engines. Even though it is a better oil they will tell you not to. I
just cheat and use a blend. Same benefits and they don't say you can't
use it. Sounds stupid but it is true.
My engines are far beyond warranty.
I just did a search and someone posted that B&S now recommends 5W30 or
10W30 synthetic for all temperature ranges.
Tecumseh has introduced new synthetic oils for both its two- and
four-stroke engines, both winter and summer applications. For winter,
the new 0W-30 synthetic oil is available in both a quart bottle and in
two new Snow King maintenance kits for snow thrower engines. This oil
gives superior lubrication, adds to engine life and delivers reduced
starting pull force for extreme cold weather use, the company said.
For summer, Tecumseh has released a new synthetic blend for its
two-stroke engines that reduces carbon build-up and extends engine life.
For its four-cycle engines, Tecumseh has introduced a new 10W-30
synthetic oil that not only extends engine life but maintenance
intervals as well. Tecumseh said these oils will be available in
maintenance kits in late 2003.
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