I paid $67 for 4 qts of lucas full synthetic oil and a filter on Amazon and just grabbed an O ring from harley. Harley's oil is fucking garbage. Lucas, Amsoil, Motul & Mobil 1 full synthetic are all damn fine products.
I used lucas in my honda and will use it on my next change for harley
2014 3, 0W-20 full synthetic (whatever major brand is cheapest) from brand new, every 7500 miles.
170k, runs like a top, burns not a single drop between changes, compression and fuel mileage exactly the same as new.
Personally I run Lucas oil in mine, not just my current zzr600, but even my older vintage bikes when I had them. It isn’t crazy expensive and is high quality.
I use Mazdas 5w-30 Ultra DPF. Mazda once said that this was the oil that they're using, so I guess what's used by mazda can't be too bad for the rex
I run Lucas in all 3 holes and my bike has been cooler, less noise and shifts smoother than it did when I got it and it had Harley fluids in it.
Right now I have some Lucas High Performance, but the brand is relatively immaterial to me. As long as it's a reputable brand and it meets the spec in the manual.
I run Lucas 5w40, it’s more about doing oil changes more often rather than anything else. VW doesn’t have any special materials in the block or heads, it’s just cast iron and aluminum no different than any other.
Many reputable rotary shops have tested numerous oils over the years, and agreed that the bearings do not have adequate protection with 5w-20 or 5w-30, especially if you track the car or do any spirited driving regularly.
I installed an oil cooler on my buddy's 370z and he dumped in oil and a full bottle of this and I just scratched my head
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