View Full Version : Fully Synthetic oil :Can it be used on a 1125?"

06-18-2010, 01:45 AM
I went into a NON Harley Davidson shop to buy oil and a oil filter, The shop had the correct oil filter on the Shelf and then asked me the age of the bike and if it was water cooled. Now being the good salesman he was sold me fully synthetic Shell Helix Ultra 10w = 40 technology motor oil for the 1125.

The question is yes / no to using fully synthetic oil

06-18-2010, 06:21 AM
I switched to full synthetic Mobil 1 on the first service.

06-18-2010, 06:39 AM
I switched to full synthetic on the first service as well. Have had it in my bike everytime I changed it. Have about 10K miles on mine, runs great.

RT Performance
06-18-2010, 09:12 AM
Per the manual and tha service schdule yes it is recommend

Mike Van V
06-22-2010, 01:49 PM
Mobil 1 since first oil change...should hit 12,000 miles by Thursday (06 24), no oil related problems.


03-13-2011, 04:17 AM
49 miles to go and I'll be ready for the 600 mile break in service. Amsoil 20W50 ready to go in.

03-13-2011, 06:31 AM
I'd use Amsoil myself, EBR just inked the 3 year deal with them for sponsorship. I've been an Amsoil user/dealer for a couple of years now also, so I'm slightly biased.

03-13-2011, 07:50 AM
I just bought Castrol Syntec 4T V Twin oil, it will go in both case and primary today or tomorrow. Use regular Syntec the last time and it was real good.

03-13-2011, 08:33 AM
oil related question. A high performance garage mechanic and i were talking and he said he switches oil brand (not weight) every oil change. he saw some studies that the oil is from the same place but each company uses different detergents. he exclaimed that sense doing so when he takes his motor apart for rebuild it has been cleaner then he has ever seen. any one like to weigh in on this?

RT Performance
03-13-2011, 10:42 AM
snythetic only engines are cleaner the oil doesn't break down like crude dino oil.
never tried using differn't kinds.
I find what i like and stick with it.
Not sure why but reccomend weight for v-twins is 20-50 for summer rides

03-26-2011, 12:39 PM
I wouldn't use anything else but a real full synthetic Group IV or V oil. The difference in price is nothing since I only change once per year. Even a fake synthetic group III oil significantly beats a conventional Group 1 or 2 oil. There are so many advantages that to list them all would require an afternoon to write but a few main ones: superior start-up flow, superior high temp stability, Lower NOACK, superior HTHS viscocity & retention (very important for shared sump bikes). The better synth oils also have higher TBN and better viscosity retention during the OCI. The two I usually run are Redine and Amsoil, although I would consider M1 V-Twin in a pinch, which is the only Mobil oil I would ever consider for any vehicle.

03-30-2011, 09:02 AM
KTM uses Motorex, so I will probably be using that in mine.
I have a new 2010 engine installed that only has about 50 miles on it right now.

03-31-2011, 07:07 AM
I have been running fully synthetic for 15K miles of smoothe riding.

03-31-2011, 02:09 PM
I run full syn in four of my five bikes. I switch at the first oil change. Brand is a preference thing IMO. I generally use what I can score a deal on. The last time around it was Mobil 1 so I picked up 3 cases. So it looks like Mobil 1 will be in the bikes for awhile.

For those who look to support the Buell brand, Amsoil would be a good choice as Dean mentioned the EBR sponsorship.

04-23-2011, 05:37 PM
I've been running Motul in mine since the second oil change, just under 11k now and no issues to report. It is a little spendy, though. I look at it as insurance!