03-01-2025, 05:28 AM
Can't comment yes or no, only what I found that's working for me.
The first year I ran regular Honda GN4 and after 4k mile it came out looking like old coffee. Black as night, no transparency, and with the viscosity of water.
Year two I tried Rotella T6 15w40 full synthetic, but that lasted less than 1800 miles, as it caused the engine to make a ticking sound.
Halfway through year two I went with Rotella T5 10w30 semi synthetic on the advice of a member at the BITOG oil forum.
Like they say, "the third time's the charm."
The engine runs smooth and quiet, and the T5 still has both viscosity and transparecy left after 4k miles, my usual drain interval.
I'm not sure if Rotella is available in Ol' Blighty, but in response to your original question, I'm getting excellent results with a semisynthetic. I don't t see any reason to pay extra for a full synthetic.
I do believe that I am getting better performance from the semi synthetic compared to the old GN4 dino oil.
The first year I ran regular Honda GN4 and after 4k mile it came out looking like old coffee. Black as night, no transparency, and with the viscosity of water.
Year two I tried Rotella T6 15w40 full synthetic, but that lasted less than 1800 miles, as it caused the engine to make a ticking sound.
Halfway through year two I went with Rotella T5 10w30 semi synthetic on the advice of a member at the BITOG oil forum.
Like they say, "the third time's the charm."
The engine runs smooth and quiet, and the T5 still has both viscosity and transparecy left after 4k miles, my usual drain interval.
I'm not sure if Rotella is available in Ol' Blighty, but in response to your original question, I'm getting excellent results with a semisynthetic. I don't t see any reason to pay extra for a full synthetic.
I do believe that I am getting better performance from the semi synthetic compared to the old GN4 dino oil.