It costs me about $30. $7. 00 per gallon for Delo 400 at Wallyworld and $9. per filter from Geno's. I change it every 4000 miles and that's a little overkill considering my driving. As far as the drain plug goes I just use a 4 gallon bucket and unscrew the drain plug far enough to get a good flow without unscrewing it all the way and loosing it in the bucket, crawl out from under the truck and give it a few minutes to drain then take plug out completely. I use the filter pliars even though it's hard to get any leverage on the thing but it works ok. The plastic baggie trick on the filter is the way to go!! I also fill the filter before install.