Fit alero Oldsmobile engine 4 cycles?

This is a solvent that works on gas/oil varnish wherever it exists. As long as the car has an internal combustion gas engine, this spray will clean the gunk out.Note: you will have to open up your engine to gain access to the gunked-up parts. Right now I have my intake off, I'll rotate the engine until both intake valves of a cylinder are closed, and am spraying this stuff onto the gunked up secondary valve.

Can I spray this on the valve tran to remove oil sludge or varnish(the valve Tran has been removed from the vehicle)?

You can spray it on metal aluminum copper exct, Do not let it get on rubber, Plastic, vinyl or paint.

Can this be used to clean generac natural gas carburator that sucked in paper filter bits due to mice?

I can't say for sure if this will dissolve the paper product, BUT, as powerful as Berryman is, I think it would...

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⚡ Clean fuel, clean ride—never miss a beat!

MOISTURE CONTROL - Effectively disperses moisture in conventional gasoline to prevent corrosion.
ENGINE SAFE FORMULA - Catalytic converter and O2 sensor safe for worry-free maintenance.
RAPID RESIDUE REMOVAL - Quickly dissolves stubborn gum, varnish, and fuel deposits to boost performance.
POWERFUL SOLVENT ACTION - Harness 100% high-energy solvent technology for peak engine cleanliness.
UNIVERSAL COMPATIBILITY - Fits all carburetors, chokes, and throttle bodies—no guesswork needed.

Berryman 117 B-12 Chemtool is a 16-ounce universal carburetor, choke, and throttle body cleaner featuring 100% high-energy solvent technology. It rapidly dissolves gum, varnish, and fuel residues while dispersing moisture, all in a catalytic converter and O2 sensor safe formula designed to optimize engine performance and longevity.

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Manufacturer	Berryman Products
Brand	BERRYMAN SINCE 1918
Model	117
Product Dimensions	6.68 x 6.68 x 24.28 cm; 453.59 g
Item model number	0117
Exterior	Machined
Manufacturer Part Number	117
Item Weight	453 g

Berryman Products 117 B-12 Chemtool Carburetor, Choke and Throttle Body Cleaner [Not VOC Compliant in Some States], 16-ounce

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