httpshttps://www.amazon.com/XADO-Engine-Additive-Revitalizant-blister/dp/B004TMM0FI://www.amazon.com/XADO-Engine-Additive-Revitalizant-blister/dp/B004TMM0FI
As I said, XADO may be not good for everyone. I'm NOT always right. I just share my experience here because I LOVE to talk about cars so much... Hope it can also work on you.
Now I think both G and M are better to drive than my new GSF on very busy highway with some traffic jams...
PS: I definitely will not put XADO in my new GSF until it becomes 10 year old or over 120k kms if XADO still doesn't blow G and M engines then...
Yes. Its dampers don't give you enough confidence but if you choose to trust M, I think you still can make it... Actually M is so capable... (However, your passengers may not feel as happy as you...)
GSF's is also good but M and G's even better... I think these Japanese cars are really designed for Aisa crowded traffic and narrow mountain roads, not for high speed autobahn... such as drivers usually sit a little higher and spring rates are higher... (because higher spring rate may cause bouncy rides on high speed autobahn... That's why my GSF is more bouncy than M5 on highways... but higher spring rates provide more fun on mountain roads!!!)
PS: GSF is also good on high speed autobahn but M5 is even better...
hthttps://www.caranddriver.com/reviews/comparison-test/a19459941/2018-bmw-m5-vs-cadillac-cts-v-mercedes-amg-e63-s-porsche-panamera-turbo-comparison-test/tps://www.caranddriver.com/reviews/comparison-test/a19459941/2018-bmw-m5-vs-cadillac-cts-v-mercedes-amg-e63-s-porsche-panamera-turbo-comparison-test/