Can VRO give me better gas mileage?

[Tripp Halbert]

1996 70hp johnson w/ vro. I bypassed the vro when i first bought the motor but i am curious; does anyone know in fact for sure that VRO/oil injection could allow the motor to get better gas mileage vs the pre-mix method???

 

[Chris1956]

Re: Can VRO give me better gas mileage?

It is doubtful that the VRO would provide better fuel mileage. The motor you are discussing mixes oil and gasoline at about a 60::1 mix, so premixing would use a bit more oil.

 

[Tripp Halbert]

Re: Can VRO give me better gas mileage?

That makes sense but is more of a question on gas mileage considering different oil/gas ratios. i guess what i am really curious about is did OMC maybe design the VRO system to function as more than just a luxury of not having to premix? Does it have some type of performance or gas mileage advantages? Just food for thought!

 

[JoLin]

Re: Can VRO give me better gas mileage?

No, Tripp, it doesn't have any performance or gas mileage advantages. I owned a VRO, and by my estimation over a couple of seasons, it used a bit less oil than it would have if I'd mixed it myself at 50:1. Like Chris said, VRO more precisely adjusts the fuelil ratio based on engine RPM. Aside from convenience, that's all it provides.

 

[Tripp Halbert]

Re: Can VRO give me better gas mileage?

Okay well good then I'm not missing out on anything ! I appreciate the input you guys

 

[dingbat]

Re: Can VRO give me better gas mileage?

Okay well good then I'm not missing out on anything ! I appreciate the input you guys

A 1996 doesn't have a VRO. It uses the OMS system which is very reliable.

 

[boobie]

Re: Can VRO give me better gas mileage?

The oms was an up graded vro and mixed oil and fuel at a constant 50;1 ratio.

 

[Tripp Halbert]

Re: Can VRO give me better gas mileage?

yes i am reading that OMS is basically VRO2. Same system just upgraded internal parts to withstand a higher wear and tear. I guess they stopped writing VRO (or VRO2/OMS) on the coulings as well due to all the hype about the earlier models system failing?