thanks for the scans based on your posts, the LG seem to favor the FUJIFILM03 and the RITEKG05 as you previously noted. the DVD11 is an acceptable scan, despite the higher PIF values. the RITEKR03 would have given a good quality scan if not for the high spikes at the beginning. your 3rd burn (with the Sony writer), however, is acceptable. also do a transfer rate test on this media to check if there are no readability problems.
another thing, when you do a quality scan on your Sony, you need to select 4X speed as reading in maximum speed introduces more errors. you can also use K-Probe for scanning as it's meant for Lite-on drives and its rebadges.
Thanks for the feedback idlewild.
I rescanned the Ritek DVD+R, Philips/RitekR03 DVD+R, and Sony DVD+R DVD11 at 4x as you suggested. You were right, the Philips RitekR03 got ratings of 90+, and the Sony disks also improved. The Ritek DVD+R (no identification as to whether it's also R03) still failed the test.
Given the results, I'm thinking of sticking to the Philips/Fujifilm DVD-R and RitekG05 DVD-R for data backup since they gave excellent results even at 8x scanning. (By the way, they it took both of them over 8 minutes to burn the video disk compared to the other disks that were under 7 minutes.) Since I understand you can't set DVD-Rs to DVD-ROM, they are not as recommended for DVD-video? That means, for my LG, I will have to go for the Sony DVD11 and then the Philips/RitekR03, or maybe the Iomega/CMC which is currently unavailable.
As for K-Probe, I've downloaded v2.4.2 and 2.4.3 but strangely the apps crash out on my pc, so I wasn't able to use them. I've disabled the RPC encoding using the LiteOn app, could this be the reason?