Which oil ?? - KTM Duke 390 Forum
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post #1 of 20 Old 08-17-2016, 11:46 AM Thread Starter
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Which oil ??

which oil should i use ?? any long term advice ??
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post #2 of 20 Old 08-17-2016, 04:42 PM
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Hello Onur, Welcome!

The Manual prescribes 15W-50 fully synthetic oil because the 390 engine is high output and runs hot. The recommended brand is Motorex 4T. However, any good quality fully synthetic oil from a major company will work. Silkolene, Amsoil, Mobil 1, Shell Rotella, Motul, Valvolene and others have been used successfully. Just be certain you have a 15W-50 fully synthetic oil.

Recommended oil change interval is 7,500 km. Some owners change earlier, at 5000km. It is good to use a new oil filter at each oil change , but if you use a short change interval you probably can change filters every second oil change.

Ride safe!
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Cheers, Will

"If you don't know where you're going, you might wind up somewhere else."
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1980 Moto Guzzi V50 II (becoming a cafe racer)
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Last edited by Diploman; 08-17-2016 at 04:47 PM.
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post #3 of 20 Old 08-18-2016, 02:19 AM
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same as diploman said.

one small detail: KTM recommends 10W40 for external temperatures -10 to 40oC (14F το 104F), and 15W50 for 0C-50oC (32-122F). This means that for average and cool climates you can use 10W40 and for hot climates 15W50. I use 10W60 motorex cross power.

I have read meny tests for oils taking into account different oil parameters and characteristics, and i agree with diploman about the fully synthetic oils, they do the job

but some oils are slightly better in tests, such as mobil1 racing 4T, motul 300V factory line, amsoil, redline, torco. Also motorex, only for the US market has the racing pro 4T, the only oil that motorex has given the technical specifications.
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post #4 of 20 Old 08-18-2016, 08:38 AM
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Everyone seems to run Fully synthetic, but (surprisingly, given the engine's fast and high revving nature - for a single) the recommended oil stated in the owner's manual is actually a semi synthetic (Motorex Formula 4T).

Here in the UK at least, Motorex is not a cheap oil though, you can buy an equivalent fully synthetic for similar money.

According to the service receipt, my KTM dealer used Motul 7100 fully synthetic (10w50).

Less is more - You can only use 150hp .001% of the time, but you can use 150kg 100% of the time ...........


2015 390 Duke / 2001 KTM 640 Duke2 / 1994 DR350 (in bits)
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post #5 of 20 Old 08-18-2016, 10:15 AM
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Here, in India, most KTM service centers use Motul 7100 10W50 Fully Synthetic Oil. Motul 300v 15W50 comes highly recommended by a number of enthusiasts, through. Here, we don't get a hard copy of the owner's manual these days...only a booklet with service coupons. These are printed by Bajaj. This specifies 10W50 (and recommends Motul 7100) for Duke 390 (and 20W50 for Duke 200). Of course, the user manual downloaded from KTM site specifies 15W50.

Difficult is just a routine....the impossible may take a little longer!!
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post #6 of 20 Old 08-18-2016, 05:28 PM
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The "W" part of the specification refers to the oil's viscosity and ability to flow in frigid wintery conditions. In India's climate that should not be an issue, except perhaps in the far north Himalayan regions. The "50" spec, viscosity when heated, is the more significant figure.
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Cheers, Will

"If you don't know where you're going, you might wind up somewhere else."
--Yogi Berra

2015 390 Duke
1980 Moto Guzzi V50 II (becoming a cafe racer)
1984 Moto Guzzi SP 1000
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post #7 of 20 Old 08-18-2016, 08:38 PM
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I already tested all kinds of oil mainly from Motul. Everybody forget that almost 100% of bikes use wet clutch so you have to see all aspects of oil including it.
At the end the result mainly with bikes with problematic clutch / gearbox the 300V factory was the best result for the pretty hot whether from Rio de Janeiro. We are in the winter and yesterday the highest temperature was 37C.
I know that it's pretty expensive but considering that it high performance engine with Nikasil on the cylinder I prefer to spend a little more in the oil but I never have a single problem and I use my bike every day.
Luis
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post #8 of 20 Old 08-19-2016, 01:56 AM
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and off course better oil means lower temperatures so less failures at head gasket for the 390.
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post #9 of 20 Old 08-19-2016, 09:00 AM
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Quote:
Originally Posted by Diploman View Post
The "W" part of the specification refers to the oil's viscosity and ability to flow in frigid wintery conditions. In India's climate that should not be an issue, except perhaps in the far north Himalayan regions. The "50" spec, viscosity when heated, is the more significant figure.
Absolutely...which is what gets me wondering why KTM service in India is using 10W oil. I plan to switch to 15W50 (Motul 300v) soon! I have experienced smoother shifts too, while using Motul 300v on my RE Thunderbird 500, whose recommended oil grade is 15W50.
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post #10 of 20 Old 08-23-2016, 02:13 AM
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for india i would use a 10W60 oil.
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