OIL QUESTION
03-21-2007, 10:16 PM
#1
Member
Thread Starter
Join Date: Dec 2005
Location: , WA
Posts: 87
Likes: 0
Received 0 Likes
on
0 Posts
OIL QUESTION
I just bought MERCURY PREMIUM PLUS outboard oil for my boat. I would like to know what ratio of oil to gas I should run. Some people say 7-8 oz to a gal others say 10 oz so Im a little confused.
Thanks,
Justin
Thanks,
Justin
03-21-2007, 10:36 PM
#2
Senior Member
Join Date: Nov 2005
Location: Snellville,
GA
Posts: 505
Likes: 0
Received 0 Likes
on
0 Posts
RE: OIL QUESTION
what oil/fuel ratio does it say to run through the engine in the owners manual. it should have a chart on the back of the bottle of how much oil to add per gal. of gas for a specific ratio. at least they did maney years ago when I ran outboard motors and you had to mix the oil and gas. now-a-days they're all oil injected.
The lower the number the more oil you need to add. a 25:1 ratio would need twice as much oil per gal. of gas as a 50:1 ratio.
also, If this is a new engine, I would mix double the ratio for the first 4-5 tanks to help with run-in. (exp.) if the manual calls for 40:1, I would mix at 20:1. for the run-in.
The lower the number the more oil you need to add. a 25:1 ratio would need twice as much oil per gal. of gas as a 50:1 ratio.
also, If this is a new engine, I would mix double the ratio for the first 4-5 tanks to help with run-in. (exp.) if the manual calls for 40:1, I would mix at 20:1. for the run-in.
03-21-2007, 11:09 PM
#3
Senior Member
Join Date: Nov 2006
Location: Browns Mills,
NJ
Posts: 814
Likes: 0
Received 0 Likes
on
0 Posts
RE: OIL QUESTION
ORIGINAL: JFACKY
The lower the number the more oil you need to add. a 25:1 ratio would need twice as much oil per gal. of gas as a 50:1 ratio.
The lower the number the more oil you need to add. a 25:1 ratio would need twice as much oil per gal. of gas as a 50:1 ratio.
03-21-2007, 11:49 PM
#4
Senior Member
Join Date: Nov 2005
Location: Snellville,
GA
Posts: 505
Likes: 0
Received 0 Likes
on
0 Posts
RE: OIL QUESTION
Yes it's absolutly right. with a fuel/oil ratio of say 50:1, It's fifty parts fuel to 1 part oil. now if it's 25:1 it's 25 parts fuel to 1 part oil. by adding more oil to a given volume of fuel, it will bring the total fuel number down.(less fuel and more oil for a given volume) does this make it easier
03-22-2007, 04:36 AM
#7
Banned
Join Date: Sep 2006
Location: Los Angeles,
CA
Posts: 422
Likes: 0
Received 0 Likes
on
0 Posts
RE: OIL QUESTION
ORIGINAL: yeeharacing
Something doesn't sound right here.... is this right?
ORIGINAL: JFACKY
The lower the number the more oil you need to add. a 25:1 ratio would need twice as much oil per gal. of gas as a 50:1 ratio.
The lower the number the more oil you need to add. a 25:1 ratio would need twice as much oil per gal. of gas as a 50:1 ratio.
rember math class
yea you are right a 25:1 ratio would need twice as much oil per gal. of gas as a 50:1 ratio
03-22-2007, 08:16 AM
#8
RE: OIL QUESTION
Justin - Get a 1 Gallon container - add 8oz of oil. Fill with fuel. Your all set.
Theres a lot of info out there but much of the Plane and Car info is bad info for a boat. A boat motor is working hard the whole time. the added oil will help with cooling and give you some added protection if you overheat.
These motors may run very low mix ratios but you may junk your motor the first time it gets hot. Seen it happen.
You wont use any more plugs with this mix ratio. You will use a little more oil and see a little more smoke but it will make the same power and be some added insurance if something goes wrong.
Theres a lot of info out there but much of the Plane and Car info is bad info for a boat. A boat motor is working hard the whole time. the added oil will help with cooling and give you some added protection if you overheat.
These motors may run very low mix ratios but you may junk your motor the first time it gets hot. Seen it happen.
You wont use any more plugs with this mix ratio. You will use a little more oil and see a little more smoke but it will make the same power and be some added insurance if something goes wrong.
