I've never lifted the car into the air to change the oil, and I would certainly never use ramps. They just look scary compared to a set of sturdy and well placed jack stands. I've never had a problem leaving the car on the ground and using extensions to access the drain plug and crawling under just the nose to get to the filter.
My 97 takes 6 quarts and states that in the manual. After adding 6 quarts, and starting the engine to fill the oil filter, the dipstick reads correctly. Always remember to run the engine a little to fill the new oil filter before checking the dipstick.
As for mixing synthetic oils, what do you think the blends that are commonly sold are? They are just that, a mix of conventional and synthetic. You shouldn't need to mix weights, but if you do on accident, it shouldn't be a problem, so long as both are close enough to the specified weight.
My 97 takes 6 quarts and states that in the manual. After adding 6 quarts, and starting the engine to fill the oil filter, the dipstick reads correctly. Always remember to run the engine a little to fill the new oil filter before checking the dipstick.
As for mixing synthetic oils, what do you think the blends that are commonly sold are? They are just that, a mix of conventional and synthetic. You shouldn't need to mix weights, but if you do on accident, it shouldn't be a problem, so long as both are close enough to the specified weight.