Tagged: Oil again
The Boat House
Topics: 91October 15, 2021 at 9:53 am #248121
The Pennzoil I have been using is a full synthetic. It is made from
natural gas and I suspect what is in their blend that that you’re
familiar with. I have 2 gallons left. That’s enough for a bit over 80
gallons. That is what is left of the 12 gallons I bought when it was
discontinued but I had been using it for years before that.
Dealers were providing service for engine failures when the heaver
oil mixes were common. The “manufactures” began recommending
50 to 1 when 2 cycle oil first became available over 50 years ago.
I have been using synthetic oils since 1975 in some motors as lean
as 100 to 1 and I have never had a failure. Actually in one case it
extended the time before rebuild. I believe the person who started
this thread is looking to run less oil. I am providing my 48 years of
experience of doing that. He said after watching my video he
thought that was proof. It’s not. I’m just another guy on the internet.
He or anyone can consider it or reject it. The proof will be his own
experience if he decides to do so. When considering how much oil
is necessary you should use your best judgement.
You're only as smart as the person you're talking to.
Topics: 11October 15, 2021 at 10:48 am #248126
When you were a kid I am sure the oil was crap, I would guess the synthetic oil today has 10x the viscosity and is much better oil I am not convinced that would happen with synthetic oil.
Topics: 11October 15, 2021 at 10:51 am #248127
I agree the proof is in the pudding, thanks for insight.
US Member - 1 Year
Topics: 18October 15, 2021 at 4:04 pm #248128
Ratios are not about the quality of the oil but the quantity. Keep in mind the quality of machinery back when your particular motor was built. In the 1930’s, tolerences were pretty loose because the machinery was primitive by today’s standards. Lots of oil helped fill in the clearances. Things got a bit better machinery wise post WW2, and ratios thinned as tolerences got tighter when more accurate machinery was created.. Nowadays, CNC machinery is the norm, tolerences are measured in ten thousandths not thousandths, and thinner oils in smaller doses are used. You can take your chances with less oil if you choose, its your motor. Personally, I’m with Tubs, using full synthetic until my last half gallon of Pennz runs out, then will search for a replacement. I mix at mfrs ratio and add a splash of Seafoam to keep things cleaner inside. As the elders say, oil is cheaper than parts. I agree.
If you have too many, AND not enough, you're a collector.October 15, 2021 at 4:17 pm #248129
As far as pass-through applications go oil of yesteryear was not that bad. Modern oils are better…long term shearing and such yes but in pass-through applications not so much.
…from bob is the oil guy.. in fact modern oils for 2smokes have been neutered to some extent for pollution reasons.
The Boat House
Topics: 91October 15, 2021 at 8:02 pm #248137
The section of a bearing that is under pressure
as a motor runs has the thinnest film of oil.
There is only room for so much oil there no
matter how much you mix in to fuel. Once you
have enough to prevent contact, there is no
benefit to adding more. Then there is friction.
The slicker the oil the less wear. You see it’s
the friction of the oil as the components rotate
that wears away the metal. Just as water does
running over a stone. It’s the same for the rings.
For me it’s the quality that will reduce wear
resulting in longer engine life. Others obviously
see it differently.
You're only as smart as the person you're talking to.October 15, 2021 at 8:41 pm #248138
…feed that journal with premix…50/1 verses 16/1 on a plain bearing….not my motor…roller elements 50/1 is fine. With a high silicon piston skirt 50/1 is okay when things are perfect. Early pistons were soft and need 16/1.
I understand the gas flashes off leaving the oil film. 50/1 is not enough oil for a non-pressure fed plain bearing. 50/1 was a boardroom decision for sales. The newer crowd sees an oil cloud they assume the motor is worn out like a 4 stroke.
The very first week of getting my 4 year in mechanical the prof says any product that lasts too long is a product failure…and products are designed to make investors money but that’s another issue..
Topics: 2October 16, 2021 at 1:24 am #248144
When OMC switiched to 50 to 1 all the motors had fixed high speed jet which prevented operators from running them too lean.October 16, 2021 at 2:17 pm #248162
…and keeps operators from running slightly rich for safety. Every fixed jetted carb motor I have received I go one hotter plug and jet to that. The folx on the chainsaw forums understand this. Manufactures have no incentive to make their products live much past warranty period. By running short on oil and slightly lean this is accomplished.
The only 4 stroke outboard I have owned from new was jetted too lean for optimum operation also. Most carbed 4 strokes of today are jetted slightly lean …especially the low speed jet.
October 18, 2021 at 8:20 am #248255
- This reply was modified 1 month, 2 weeks ago by rudderless.
I stand by my opinion expressed before, this OMC recommendation is dangerous when it comes to CD/AD series engines with plain bearings. 16:1 is what should still be used. The beauty part of these engines is that they smoke very little, even at 16:1 when in good shape and properly tuned…
Canada Member - 2 Years
Topics: 282October 18, 2021 at 12:39 pm #248267
Here’s a ’58 Johnson CD which I just finished servicing. It’s running on a 16:1 mix using Canadian Tire dino oil and shows no smoke at idle and just a bit when revved up some.. This wouldn’t even be noticeable if it was on a boat out on a lake.October 18, 2021 at 4:08 pm #248281
Here’s a ’58 Johnson CD which I just finished servicing. It’s running on a 16:1 mix using Canadian Tire dino oil and shows no smoke at idle and just a bit when revved up some.. This wouldn’t even be noticeable if it was on a boat out on a lake.
What a beautiful engine, thanks for the testament to the old engines….October 18, 2021 at 7:22 pm #248297
Anyone remember the 100/1 recommended mix some years ago? how’d that go…
International Member - 2 Years
Topics: 52October 19, 2021 at 3:34 am #248336
I remember seeing a can back about 1963……..can’t remember the brand. It was in a small sealed can, similar to a baked bean can, but smaller. I think it came from Singapore and if I remember correctly, it had a warning on it that it wasn’t good for your health and to be careful using it.
It was a bit of an eye opener to us young guys who were used to using 24 to one oil ratios
- You must be logged in to reply to this topic.