From: Steve on 1 Dec 2008 11:47
> "Mark A" <someone(a)someone.com> wrote in message news:0clYk.1725
>> I also had an edger with a Briggs and Stratton engine and the oil
>> turned black after one use. I knew immediately that the Briggs and
>> Stratton engine I had then (don't know about newer ones) was not
>> suitably built for synthetic oil (in the same way those Chevy Caprice
>> and Crown Vic engines used in NYC taxis are not suitable for synthetic
> Mine was a B&S too, Mark.. The engine was ruined in short order.
And I've been using synthetic oil in 2 B&S 6-horsepower lawnmowers and a
5-horsepower tiller for over 10 years now. All 3 are good as new,
despite being air-cooled engines that see most of their operation in
near-100 degree F ambient temperatures.
Of course the same was true of the 60s B&S engines I had back in the 70s
and 80s that only got single-grade SAE 30 dino oil, too. I just can't
kill a B&S, and I sure don't take it easy on them. I've only ever gotten
rid of a B&S powered mower because the mower deck fell apart around the
From: SMS on 1 Dec 2008 12:21
> If you believe that particular engines are "not suitable for synthetic
> oil," then there's no use trying to have an intelligent,
> engineering-based discussion.
LOL, it took you this long to figure that out?!
Certain engines may not be suitable for 0W30 oil, but as long as you
stick with the proper weight oil you'll be fine. The color of the oil is
no indication of anything. Probably what happened was the Briggs and
Stratton engine had a non-detergent motor oil, and the synthetic was a
detergent oil. Non-detergent oils are often used as factory fills on
lawn equipment. After a couple of oil changes the gunk on the engine
would have been gone, and the synthetic would look just as clean as
whatever was used before.
From: Scott Dorsey on 1 Dec 2008 12:32
Steve <no(a)spam.thanks> wrote:
>> I also had an edger with a Briggs and Stratton engine and the oil turned
>> black after one use. I knew immediately that the Briggs and Stratton engine
>> I had then (don't know about newer ones) was not suitably built for
>> synthetic oil (in the same way those Chevy Caprice and Crown Vic engines
>> used in NYC taxis are not suitable for synthetic oil).
>If you believe that particular engines are "not suitable for synthetic
>oil," then there's no use trying to have an intelligent,
In the case of small engines with splash-plate lubrication rather than
an oil pump, the synthetic oils are NOT generally suitable for them. The
better flow characteristics of the synthetics mean the splash plate cannot
pick up enough oil.
This is why Royal Purple, for instance, makes a special synthetic oil
that is designed to be extra-sticky, for small engines.
"C'est un Nagra. C'est suisse, et tres, tres precis."
From: jim on 1 Dec 2008 12:45
> jim wrote:
> > As far as I know the type of dirt that gets into oil due to combustion
> > byproducts is not going to be any different for synthetic oil.
> That's true, and is a key part of this discussion. Too bad its being
> discussed in terms of "synthetic" versus "conventional," because that
> really doesn't matter. What DOES matter is the rest of the oil additive
> package, in particular the compoenents that maintain the total base
> number (TBN) and keep the oil from becoming acidic. You can have
> synthetics with poor TBN control additive, and you can have
> conventionals with good packages. Now *most* synthetics also happen to
> be higher-end oils and have decent additive packages... but its not
> BECAUSE they're synthetic.
Yes, and "becoming acidic" is just one of the things that happens to oil as the
miles go by. So what is the advantage of getting a good additive package that
counteracts or slows down that inevitable deterioration versus just changing the
oil more frequently to avoid the deterioration?
----== Posted via Pronews.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.pronews.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= - Total Privacy via Encryption =---
From: Brent on 1 Dec 2008 12:43
On 2008-12-01, jim <".sjedgingN0sp"@m> wrote:
> Yes, and "becoming acidic" is just one of the things that happens to oil as the
> miles go by. So what is the advantage of getting a good additive package that
> counteracts or slows down that inevitable deterioration versus just changing the
> oil more frequently to avoid the deterioration?
Guess that depends on how much you value your time or enjoy doing oil