Looking for other users with comparable rigs and what their oil use has been per 100 hours for both motors. My use profile is ~ 40% at or below 4000 RPM, 60% at or below 1500 RPM trolling. BRP is claiming my oil use (~83:1) is normal. I don't think so. Folks with any of the small block V6's can help me here. Tkx.
Jim
Modified by WildeOne at 1:25 PM 8/8/2006
Around 100:1 is average for E-TECs set up for XD-100 oil. With bass boats and a lot of high speed runs and accelerations, the oil use goes up a bit, and off shore boats with a lot of trolling time do a bit better better at oil consumption.
why do you think yours is out of line?
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A Technical troubleshooter possessing more tools than talent !
I've cooresponded with a charter operator in FL with the same motors, similar RPM profile, similar boat (I think his hull is a 25' CC). He's used 4 gal/100 hrs with ~ 300 hours on his motors. I had a 1985 J140 with VRO (was upgraded to VRO2 in 1986) and that motor was between 100 and 150:1 with MUCH cheaper oil. With all the BRP hype about oil consumption, I was expecting way better with brand new E-Tecs and $30/gal oil. If I have the motors reprogrammed for XD30/50, I would be way ahead economically ... no?
wild ...not to dispute yournumbers on the 140 vro...but i have had extensive use out of a 87 140 vro looper & a 135 crossflow & niether got anywhere neer 100 to 1 much less 150 to 1. my 87 140 got around 50 to 1 & i ran it pretty hard so if i had trolled a little more it would have gotten a little better but know where near the figuires your talkin about. you would have to troll 95 to 100 % of the time to achieve your oil numbers.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WildeOne »</TD></TR><TR><TD CLASS="quote"> I had a 1985 J140 with VRO (was upgraded to VRO2 in 1986) and that motor was between 100 and 150:1 with MUCH cheaper oil. </TD></TR></TABLE>
The '85 140 may have idled at 100:1, but once it got running up on plane, it pumped around 50:1, just like any other motor.
On your E-TEC oil consumption, it is like someone else's fuel consumption. It varies too much depending on throttle position, prop load, and the number of accelerations and deaccelerations whether by throttle or by a following sea. Each time you check it it will differ.
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A Technical troubleshooter possessing more tools than talent !
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WildeOne »</TD></TR><TR><TD CLASS="quote">I've cooresponded with a charter operator in FL with the same motors, similar RPM profile, similar boat (I think his hull is a 25' CC). He's used 4 gal/100 hrs with ~ 300 hours on his motors. I had a 1985 J140 with VRO (was upgraded to VRO2 in 1986) and that motor was between 100 and 150:1 with MUCH cheaper oil. With all the BRP hype about oil consumption, I was expecting way better with brand new E-Tecs and $30/gal oil. If I have the motors reprogrammed for XD30/50, I would be way ahead economically ... no?</TD></TR></TABLE>
I'm pretty sure Mr. Wilde is referring to me so I'll respond. I did indeed use a little over 4 gallons of oil in my first 100 hours of use. I know that for a fact. I don't ever remember mentioning how much fuel I burned during that period though. I do think I stated that I was getting at or better than 100:1 though.
On a typical day, I'll put 8-9 hours on my engines and burn 30-40 gallons of gas. It varies according to the type of trip I run, the conditions, load, etc. So my fuel consumption over a 100 hour period would be in the ballpark of 333-500 gallons. I stated on another thread that I was using around 4-5 gallons of XD-100 per 100 hours of use. That's right at or around 100:1 by my math. I also live-bait/slow troll A LOT, especially during this time of year. It's almost exclusively what I've done with my 175's since I started running them in mid May. While I'm live-baiting, I run with one engine just clicked in gear. It's the perfect speed for that type of fishing. At that speed, I can go for a little over 5 hours on 1 gallon of gasoline per engine (thus according to the fuel flow coming from the EMM). At a 100:1 ratio, that equates to 100th of a gallon of oil. I could probably spit that much - it's basically nothing. So for 5-6 hours out of every 8-9 hour period, I'm burning practically no oil. The bulk of my consumption occurs while I'm cruising back and forth.
Tim, sounds like allot of oil. If you figure 4hrs running which is about 40% of the 100hrs those engines are burning oil at 40-50 to 1 while you are running.
333/4 = 83.25
333/5 = 66.6
500/4 = 125
500/5 = 100
Without knowing my exact fuel burn over 100 hours, I can't finger the oil consumption ratio precisely. My fuel consumption estimates are just that - estimates. But I feel that I was pretty fair in my assessment.
According to my math, I am seeing somewhere between a possible low of 66.6:1 and a possible high of 125:1.
Most likely though, I'm seeing somewhere between 83.25:1 and 100:1
I'm pretty happy with that.
Yes, for what you are doing you are seeing those numbers, but if you ran them at 4000rpms, cruising rpms for those 8-9hrs you'd be down in the 40-50 to 1 range. Of course this is assuming you right about what you are burning at 500rpms slow trolling on one horse.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dunk »</TD></TR><TR><TD CLASS="quote">Yes, for what you are doing you are seeing those numbers, but if you ran them at 4000rpms, cruising rpms for those 8-9hrs you'd be down in the 40-50 to 1 range. Of course this is assuming you right about what you are burning at 500rpms slow trolling on one horse.</TD></TR></TABLE>
Sorry Dunk. I respect your opinion but I have to ask how you are figuring this? The oil consumption numbers I mentioned above at idle are based on a 100:1 fuel to oil ratio. The same that I would get at cruise. Sure I burn more oil at cruise rpm. That only makes sense cause I'M BURNING MORE FUEL ALSO.
I don't know where you're coming up with 40:1. It certainly isn't based on anything that I've said.
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