Can a MBP 15'' early 2011 run DDR3L ram? I have an early-2011 MBP 15' with an Intel I7 2,2 GHZ core. I'm thinking in upping the RAM to 16GB with 2x8 DDR3L sticks. 

I've read that using DDR3L with this core is not recommended, is this correct? Can I safely use these sticks?

Thanks.
Yes, you can. Please take a look at this link from Crucial, which states that the MacBook Pro (15-inch, Early 2011) can run:

Memory Type: DDR3 PC3-10600, DDR3 (non-ECC)
Maximum Memory: 16GB
Slots: 2


The website even provides you with the recommended RAM for your computer. Look at the picture below.