Rudolf wrote: >>>>My bike's engine starts consuming the engine oil from around 6000 rpm. From the max. level on the dipstick the oil descends to the min. level under 1000 km of riding.<<<<
Rudolf, I ride a lot on US interstate FULL BLAST, usually in the 8000+rpm range. Yes, I had therefore on the G/V a higher than usual oil consumption. But here is how I reduced it to about half:
My G/V has about 12,500 miles right now. At about 10,500 miles I did the following:
Added about 15% "Restore" Engine restorer (that we can buy at Auto Accessories stores in the US) to the engine oil. You may find similar in your country if you are not in the USA. This helped to reduce/eliminate the fine scratches on the cylinder walls, and gave better compression, less oil loss.
Increased oil viscosoty with oil thickening additive like "Lucas Oil treatment"; same can be done with STP or similar oil viscosity stabilizing additive.
Third; use NON multi viscosity oil, one-grade mineral oil (not synthetic) is best for these engines. I recommend to go to one grade viscosity W40, unless you go into cold winters and drive under 40F/10C, then stay with one grade visosity W30.
I have done similar to other vehicles, and the biggest noticeable improvement I have seen was on my GY6 150cc engined scooter that had significant power improvements and a huge reduction in oil burning, as it turns about 9500 rpm at top speed. But also the Grand Vista made great improvements, about half the oil consumption now, than originally.
PS: Performance note:
When I got my G/V used, it was apparently quite "clogged" up, as the previous owner seemed to never care about keeping the combustion and valve parts clean, thus it ran just a bit over 70mph GPS measured. I believe the thicker oil and cylinder treatment helped to gain compression, and also power, but the additive to clean the intake and combustion parts was probably an even more significant improvement for regained power.
I have read about the "Seafoam" additive treatments people do here on the list, and that is OK, but IMO it is a way too expensive product. What one can buy in the US right over any counter (even Wal-Mart) is for exaqmple "Gumout" fuel treartment/cleaner for about US$3.00 per concentrated bottle, that will last for a long time as it treats up to 21 Gallons (about 80L) of fuel. However, any similar product additive from STP, Mobil, Techron, Amsoil, etc. is fine too, as long as they explicitly mention on the bottle that they will clean valves and combustion chambers.
FYI: With that my G/V gained back its true real life power, measured on "benchmark" hills where it runs up about 2-3 miles faster than when I got it. Otherwise I have changed absolutely nothing, not even adjusted the valves or any similar, it is all related to the oil mentioned above and clean intake/combustion parts.
Topic: Ref: reducing oil consumption; clean valves and combustion chamber (Read 5222 times)