Regarding my Stay in US for more than 6 years on L1 Plus H1 Visa

[Somnath Das]

Situation : I have stayed in US for 4 years . Initially 3 years on L1 and the last 1 year on new H1.
I have left US on Oct 1st 2014.

Query :
If I go back to US on (say) OCT 5th 2015 (1 year staying out of US) ...
Can I consume remaining 5 Years of my existing H1 ?
OR will it be just 2 years out of my remaining overall 6 years ?
OR should I need to file new H1 under cap exempted (if possible) on Oct 2015 to avail remaining 5 Years of my existing H1?

Just need the best way to get maximum benefit of my existing H1B and stay the most.

Thanks for your help !
- Som