SAE 10w30 conventional or synthetic.
It is around 933.95kg (2059lbs).
A stock Suzuki Samurai weighs 2,100 Lbs, empty, and has a maximum vehicle weight of 2,932 lbs.
Convertible 2094 lbs Hardtop 2127 lbs According to the 1988 Drivers Manual
10w 30
Try downshifting Down shifting will help but the reason it helps is because the Samurai is a low power engine. Brand new from the factory my '86 1.3 liter is 66 horsepower. That is less that some motorcycles and maybe even a few golf carts... Ha! Seriously is is a lot of metal powered by a small engine so the weight to Horsepower ratio is low.
Curb Weight: 4127 lbs std cab 5.0 engine
with the 5.2L engine, 4085 lbs.with the 5.9L engine, 4144 lbs.
Often times the answer is yes. If you have a pickup truck and a SUV both with the same engine the pickup will get better mpg because the pickup weighs less. The more weight you have to move around the harder the engine has to work and the more gas it will use.
A 1952 Ford F1 Pickup with a short bed and a V8 engine weighs about 3550 pounds without a driver
5W30
It is normal to specify the oil needed to fill an engine in terms of volume rather then weight. One usually purchases it in litres.
The Suzuki Hayabusa engine weighs around 134 lbs, or approximately 61 kg.