Newest Guzzi oil specs

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   I see that on the latest models Guzzi is now recommending 75W140 for both the gear box and bevel.Previous models, mine specifically, it was 75W90 for the gearbox and 85W140 for the bevel. Looking at the parts fiche on the gearboxes there are very few differences that wouldn’t account for the change in specs. So, I assume when I run out of both I can use the 75W140 in both. It would be nice to only keep one on hand. Good idea or bad?

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Zener Members Profile Send Private Message Find Members Posts Add to Buddy List Guzzino Joined: 07 Oct 2020 Location: Ohio, USA Status: Offline Points: 6	Post Options Post Reply Quote Zener Report Post Thanks(0) Quote Reply Topic: Newest Guzzi oil specs Posted: 15 Nov 2022 at 19:49
	I see that on the latest models Guzzi is now recommending 75W140 for both the gear box and bevel. Previous models, mine specifically, it was 75W90 for the gearbox and 85W140 for the bevel. Looking at the parts fiche on the gearboxes there are very few differences that wouldn’t account for the change in specs. So, I assume when I run out of both I can use the 75W140 in both. It would be nice to only keep one on hand. Good idea or bad?
	Zener

paulbricey Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 23 Dec 2019 Location: Stockport UK Status: Offline Points: 437	Post Options Post Reply Quote paulbricey Report Post Thanks(1) Quote Reply Posted: 16 Nov 2022 at 17:42
	In general 140 grades are fine/better for slow(ish) moving non-very hot gearbox & bevel box because that determines the viscometrics - just don't forget the bench/rig tested wear performance (& hence extreme load/corrosion etc additive levels are higher) determines GL-3/4/5 grade....and I think they are all saying GL5 for modern (being made still) Guzzis
	Griso 1200 8V, V50

Andy M Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 27 Jan 2015 Location: Leeds Status: Offline Points: 1056	Post Options Post Reply Quote Andy M Report Post Thanks(1) Quote Reply Posted: 17 Nov 2022 at 11:51
	The parts fiche doesn't show tolerances or materials. The GL rating is probably more important than the grade. Having had the #$%^&@#s that pass for dealers use the wrong oil in a 2022 V7 850 I can confirm it makes a big difference. At 5C it was impossible to get from first to second gear for the first mile. Change the oil to what the manual calls for and you can. Not sure why you'd want to move away from the spec for your given bike? Just the convenience of not taking two bottles into the garage? If you are doing a 20000 mile tour fair enough, otherwise I can't see why it would be such a hassle. Andy

Mike H Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8442	Post Options Post Reply Quote Mike H Report Post Thanks(1) Quote Reply Posted: 17 Nov 2022 at 16:49
	If it helps, I started using 85W140 in my old 1976 Le Mans 850, it improved it no end! Gear change was almost slick (albeit a later California 3 gearbox by this time), and the final drive was noticeably cooler after a long run. It was a reccomendation years ago on the club forum, plus a bit of molyslip, in both gearbox and FD.
	"Chicken nuggets don't dance on a Tuesday."