my manual says to use 10w40 wt
Not sure
Iraqi the front of the engine at the bottom
go to: www.goldwingdocs.com
No
This bike has an engine with a displacement of 1084.00 cc's or 66.15 cubic inches.
1980 was the first new version of the Goldwing Interstate. It came with the 1100 engine. That lasted till 1983, then the "84's came out with the 1200, good till 1987, then the 1500's. The 1980 Interstate all dressed cost me just $ 5,000.00 here in Canada, those were the day's.
Should be just beside the battery.
Water cooled.
Yes.
This bike takes about 3.7 quarts.
Honda 10w40 works well
'79 is a 1000 cc , '80 is a 1100 cc. You would have to compare the both. Or check with the parts dealer.
Follow the lower rad. hose. Its in there. Have to remove the rad.