OP
UTC

Member
1980 P200E
Joined: UTC
Posts: 43
Location: Savannah
 
Member
1980 P200E
Joined: UTC
Posts: 43
Location: Savannah
UTC quote
Hello,
New to this forum. I am waiting for a delivery of my 1980 P200e that I purchased from another site before finding this forum.
My first inquiry is gas or petrol type. Here in Savannah I have access to ethanol free gas, however the octane level I believe is 89. Then the premium from Mobil at 92 octane with detergent additives to clean the system.
I have BMW motorcycles that are older as well. BMW changed the hardness or composition of the metal used in their valve stems after adverse effects were caused by the elimination of lead from gas.
Can anyone say what they use as petrol and whether or not unleaded fuel had any detrimental effects on my model and year? (1980 p200E) U.S. model: Thanks
@xantufrog avatar
UTC

Moderibbit
1980 P200E - "Old Rusty", 1976 ET3 Primavera
Joined: UTC
Posts: 8892
Location: Atlanta, GA
 
Moderibbit
@xantufrog avatar
1980 P200E - "Old Rusty", 1976 ET3 Primavera
Joined: UTC
Posts: 8892
Location: Atlanta, GA
UTC quote
Welcome from Atlanta!

Neither is ideal, but IMO I'd go with the 92 with ethanol to avoid preignition (what I do) - the only issue I've had so far is it separating with disuse in humid weather. Your mileage may vary depending on if your fuel line is ethanol friendly... (easy to swap if not)

FWIW I've run both as needed - riding long distance you often don't get a choice. Stop at some ma and pa place in a random valley and you take what you can get. Someone may yell at me, but if you aren't pushing it really hard it doesn't matter much on a stockish scoot.
⚠️ Last edited by xantufrog on UTC; edited 2 times
@mjrally avatar
UTC

Veni, Vidi, Posti
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 59 Ser 2, 65 Silver Special, 90 V5N 50, 2015 HD Road Glide Special
Joined: UTC
Posts: 5143
Location: Oceanside, CA
 
Veni, Vidi, Posti
@mjrally avatar
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 59 Ser 2, 65 Silver Special, 90 V5N 50, 2015 HD Road Glide Special
Joined: UTC
Posts: 5143
Location: Oceanside, CA
UTC quote
Use the highest octane content you can find.

Ever been to a Banana ball game?
UTC

Hooked
PX150E
Joined: UTC
Posts: 253
Location: Florida, USA
 
Hooked
PX150E
Joined: UTC
Posts: 253
Location: Florida, USA
UTC quote
John Young wrote:
Hello,
New to this forum. I am waiting for a delivery of my 1980 P200e that I purchased from another site before finding this forum.
My first inquiry is gas or petrol type. Here in Savannah I have access to ethanol free gas, however the octane level I believe is 89. Then the premium from Mobil at 92 octane with detergent additives to clean the system.
I have BMW motorcycles that are older as well. BMW changed the hardness or composition of the metal used in their valve stems after adverse effects were caused by the elimination of lead from gas.
Can anyone say what they use as petrol and whether or not unleaded fuel had any detrimental effects on my model and year? (1980 p200E) U.S. model: Thanks
My 1985 PX150E has never had any issues with any gas I have put in it over the last 35 years. But ethanol fuel is not very kind to the fuel line, especially if the bike sits unused for long periods. On average, I have had to change the line at least 10-15 times in this period; once, I found that the fuel line had shrunk to more than 2" shorter; another time, not only it shrunk, but the shrinkage had forced it off the fuel nipple, even with the clamp still on.
Unfortunately, I still have not found a good quality hose up to the job.
That said, I now use 93 grade non-ethanol, and the motor runs fantastic, better than ever.
OP
UTC

Member
1980 P200E
Joined: UTC
Posts: 43
Location: Savannah
 
Member
1980 P200E
Joined: UTC
Posts: 43
Location: Savannah
UTC quote
Wow! 10-15 times changing the fuel line. I'll be in search of a fuel line not affected by ethanol. Where can someone find 93 grade non-ethanol fuel? My 1985 BMW r80rt runs noticeably better on ethanol free 87 octane gas.
@birdsnest avatar
UTC

Not So Moderator
VNB VSC VMA VSX - o9c vbc vmb
Joined: UTC
Posts: 8314
Location: Hustletown, TX
 
Not So Moderator
@birdsnest avatar
VNB VSC VMA VSX - o9c vbc vmb
Joined: UTC
Posts: 8314
Location: Hustletown, TX
UTC quote
I fill a 5 gallon and 3 gallon can with ethanol free.

Closest station with ethanol free is about 20 miles, but it seems worth the drive
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