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Anybody familiar with the 3.6 L GM engine is also aware that mobile one full synthetic is the factory recommended lubricant of choice. You can buy a 5 quart jug for about $25-$30. Unfortunately the engine holds 6 quarts, so you have to buy an additional bottle of 5W-30 mobile one full synthetic oil at an additional cost of about eight dollars. When they switched the Buick V8 from an aluminum intake manifold to a plastic one all heck broke lose. An otherwise perfect engine was devolved and plagued with coolant leaks. The 3.8 is now undercontrol according to GM thank goodness! If you are looking at 2004 or 2005 GM products try to get one with the Buick 3.8.
The 4.3 Liter Vortec engine is built by General Motors. This is a V6 engine that has had a long history, although much has changed along the way. The 4.3L Vortec built today is certainly significantly different from the original Vortec first offered in the mid-1980s.The list of cars that have used the is a long one. This engine has been in offered and most of the truck and van applications from the mid-80s to present day.It was also offered in a line of cars in the mid to late 80s, including the Impala, Caprice, El Camino, and Monte Carlo, just to name a few. 4.3L Vortec V6 Engine SpecsLU3EcoTec3 LV3Displacement (cu in / cc):262 / 4300262 / 4300Horsepower:195 hp @ 4600 RPM285 hp @ 5300 RPMTorque:260 lb.-ft. @ 2800 RPM305 lb.-ft.
In 2002, the 4300 received another facelift as GM went back to the multi-port injected engine and introduced the LU3 and the LG3. The LU3 engine 4300 Vortec version is surviving well in models such as the Chevy S-10 light. The current LU3/LG3 engine is rated between 180 to 200 horsepower at 4,600 rpm with 260 foot-pounds of torque at 2,800 rpm, depending on the model driven. The engine uses a cast-iron block and heads and has a bore and stroke of 4 inches by 3.48 inches. The engine has an overhead valve configuration with two valves per cylinder.