What oil do I us just 1200 generations engine 79.5 cc

Use the oil designed to be mixed with your fuel. Available at all outfits that sell generators, etc. Walmart and home depot have it.

if you know the original vehicles vin use this link
http://www.vindecoderz.com/EN/Toyota

if not
they made heaps of engines for the toyota vehicles
The 2.0 L 5R motor was produced from 1968 through 1986.

thats a lot of years to chase one engine number


from wiki
the 5R series engine
The 2.0 L (1,994 cc) 5R family was produced from 1968 through 1986.
An LPG version, the 5R-LPG, was produced from 1968 through 1983.
It was a 2-valve OHV engine. Cylinder bore was 88 mm (3.46 in) and stroke was 82 mm (3.23 in).
Output was 106 hp (79 kW) at 5,200 rpm and 125 lb·ft (169 N·m) at 3,000 rpm.
Applications:

• Toyota Crown: third through sixth generation (RS50, RS60/66, RS80/RS100, and RS110). Only with LPG for taxi use in the last two generations.
• Toyota Dyna RU10
• Toyota Stout RK101
• Toyota Toyoace RY20
• Aug 1981-? Toyota Corona sixth generation (RT131), only LPG with automatic transmission.

Pssst! We sell all the parts and spares for UST Generators on our website.

http://www.generatorguru.com/ust/

Need more advice? We have Generator Engineers happy to assist. Contact us, we are always happy to help!
http://www.generatorguru.com/ask-the-guru/

Regards
The Generator Guru Team
http://www.generatorguru.com/ust

If the unit you have is a four cycle engine " no oil/gw mixing required ..use any good SAE 30 oil...no multi grade needed...good luck...

ENGINE 2 stroke single cylinder direct reed valve crankcase induction Liquid cooled 125 cc engine Cylinder size 124 8 cc Bore and stroke 54 x 54 5 mm 200 cc engine Cylinder size 175 3 cc Bore and stroke 64 x 54 5 mm 250 cc engine Cylinder size 247 7 cc Bore and stroke 72 5 x 60 mm 280 cc engine Cylinder size 272 2 cc Bore and stroke 76 x 60 mm 300 cc engine Cylinder size 294 1 cc Bore and stroke 79 x 60 mm I Cant put periods or commas so bare with me

you drove car , with it screaming like that. really?
big error that?
if engine (type not stated) is interference engine , they grenade.
that means you bend over the head valves, at least.
post engine full spec


quote: which engine, cant help not knowing the ENGINE !
generation 5 is:

• 1988-1995: 1.8 L (1,812 cc) 2Y-U I4, 58 kW (79 PS; 78 hp) at 5,000rpm 140 N·m (100 lb·ft) at 3,200rpm

2Y I4, 61 kW (83 PS; 82 hp) at 4,800rpm 140 N·m (100 lb·ft) at 2,800rpm (export markets)[11]

• 1989-1995: 2.4 L (2,366 cc) 22R-E SOHC EFI I4, 84 kW (114 PS; 113 hp) at 4,600 rpm and 192 N·m (142 lb·ft) at 3,400 rpm
• 1989-1995: 3.0 L (2,958 cc) 3VZ-E V6, 112 kW (152 PS; 150 hp) at 4,800 rpm
• 1989-1997: 2.4 L (2,446 cc) 2L diesel I4, 61 kW (83 PS; 82 hp) at 4,200 rpm and 165 N·m (122 lb·ft) at 2,400 rpm[12]
• 2.8 L (2,779 cc) 3L diesel I4, 67 kW (91 PS; 90 hp) at 4,000 rpm and 188 N·m (139 lb·ft) at 2,400 rpm

Toyota Hilux?
wow no year, you do make it so hard to answer but is 96+
P1 means factory code, so autozones may fail.
5th generation 1996+
Engines:

• 1988-1995: 1.8 L (1,812 cc) 2Y-U I4, 58 kW (79 PS; 78 hp) at 5,000rpm 140 N·m (100 lb·ft) at 3,200rpm

2Y I4, 61 kW (83 PS; 82 hp) at 4,800rpm 140 N·m (100 lb·ft) at 2,800rpm (export markets)[11]

• 1989-1995: 2.4 L (2,366 cc) 22R-E SOHC EFI I4, 84 kW (114 PS; 113 hp) at 4,600 rpm and 192 N·m (142 lb·ft) at 3,400 rpm
• 1989-1995: 3.0 L (2,958 cc) 3VZ-E V6, 112 kW (152 PS; 150 hp) at 4,800 rpm
• 1989-1997: 2.4 L (2,446 cc) 2L diesel I4, 61 kW (83 PS; 82 hp) at 4,200 rpm and 165 N·m (122 lb·ft) at 2,400 rpm[12]
• 2.8 L (2,779 cc) 3L diesel I4, 67 kW (91 PS; 90 hp) at 4,000 rpm and 188 N·m (139 lb·ft) at 2,400 rpm

my wild guess is the 2.4L due to OBD2 status. only...you need to say..





my motto:
NO YEAR
NO MODEL
No engine size. (or transmission type A/T or M/T?, if that is in question)
NO HELP (or your joy)
No country , too , is a royal pain , all cars are different by country (laws)

I think there is some faults to cause the generator stop, focus on checking the oil circuit, gas path and generator load.

https://www.dieselgeneratortech.com/diesel-generators/faults-caused-by-low-load-operation-of-diesel-generator.html

It is not the oil switch you need to adjust the heads open the side and check on the settings for both in and out and adjust them according to the manual...in the winter sometimes they do not like heavy oil so check the oil weight and try lighter one