[Onurag Chatterjee]

Hi Steve!

What I meant was - per my own experience - semi-synthetic oil doesn't seem to hold its properties beyond 3000 Kms, unlike fully-synth oil.

After using it for 2.5K or so Kms, I feel an increase in the noises and vibrations from the engine + the gear shifts become clunkier.

[SteveThackery]

Hi Steve!

What I meant was - per my own experience - semi-synthetic oil doesn't seem to hold its properties beyond 3000 Kms, unlike fully-synth oil.

After using it for 2.5K or so Kms, I feel an increase in the noises and vibrations from the engine + the gear shifts become clunkier.

Fascinating - thanks.

[jez]

Use a standard NGK? I and others round here avoid them like the plague. I use Lodge HBLN NOS stock. Starts much easier with those.

[Onurag Chatterjee]

Use a standard NGK? I and others round here avoid them like the plague. I use Lodge HBLN NOS stock. Starts much easier with those.

Sorry to hear about your bad experience with NGK.

I've had an NGK Iridium (BPR5EIX) installed on mine since 2021. In conjunction with aftermarket micro-relays, it has transformed the bike's ease of starting, running and tendency to stall at low RPMs.

From personal experience the stock relays are of a very-poor quality and quite unreliable, and aftermarket ones from Bosch, Hitchcocks or Roots (India-specific) are even more useful than an aftermarket spark plug like the NGK.

But the combination of the two items has benefitted the overwhelming majority of GT535 users I've interacted with.

[AzCal Retred]

@ #15: Years back when I commuted for work  I had a Toyota pickup with an oil pressure gauge. Mobil 1 Synthetic retained idle oil pressures up to 2500 miles at close to fresh oil change values, much better than the 1200-1500 miles the plain oils would. We all change over time, right?

I too prefer "No-Good Kind" (NGK) sparking plugs, a holdover from my desert racing days. The projected tip Iridium plugs are a long-time favorite. Heat range is largely determined by engine condition & personal usage. All my pre-unit Bullets need their spark plugs at an NGK heat range 5 to 6 to stay clean.