What is a safe ratio to run on my 97 2.5EFI260. The manual says 32:1 but some people are telling me to run 50:1 otherwise I will not get full performance. Any info would be appreciated.
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What is a safe ratio to run on my 97 2.5EFI260. The manual says 32:1 but some people are telling me to run 50:1 otherwise I will not get full performance. Any info would be appreciated.
What ratio to use depends on the oil.
What type of oil are you using?
I'm using Klotz synthetic
Then it's a matter of how hard you run it.
Very few problems come from running a little rich, almost none!
On the other side, running lean can eat your engine! Lean toward the rich side if in doubt! http://free.***boat.net/ubb/wink.gif
Originally posted by HavasuBarney:
Then it's a matter of how hard you run it.
Very few problems come from running a little rich, almost none!
On the other side, running lean can eat your engine! Lean toward the rich side if in doubt! http://free.***boat.net/ubb/wink.gifExactimundo! A handful of fouled plugs and the possibility of excessive carbon build-up (over a period of time) far outweighs the nastiness brought on by a lean condition, ie: piston seizure, burned piston, frozen or broken rings, scored cylinders, etc. As HB said, if in doubt, lean to the rich side! (excuse the pun) Especially in a high heat climate!
[This message has been edited by gigamurph (edited October 25, 2001).]
The Merc Perf. series 2.5 EFI
Puts out 262 HP with the recomended
oil ratio: 32:1
So I would certanly use this mixture..
Dont go any leaner !
The 50:1 confusion is for stock
Mercs.
Run 32:1 and your motor will last. Remember these are High Performance motors with tighter tolerences and more friction.
Tim
Hey JohnnyD.....
I've got the same motor and run the same oil(Klotz)......32:1 runs perfect never miss's a beat,tops of pistons look fine........Johnny Rocket
What is everybody's feelings on running Amsoil 100:1 at a mix of 75:1? I've always run my motors this way, but I just want to be sure I am doing the right thing for my motor.
1998 2.5 EFI 260 on a 22' Activator.
it depends on what you want 32:1 is better for the motor but 50:1 is designed for more rpms in order to change oil ratios i would recomend ptting an air box on the front of the motor