I prefer the duplex roller timing chain over the cogged belt. Must change oil on a frequent schedule to get the most life from the chain and the engine as a whole. Some newer engines have a simplex roller chain and if the quality is there, time will give the verdict on that scenario for durability. Owned a 123 body Mercedes Benz 300D coupe diesel 5 cylinder which had the duplex chain and it was still just fine with close to 500,000 miles, a belt would never get there.
I prefer the duplex roller timing chain over the cogged belt. Must change oil on a frequent schedule to get the most life from the chain and the engine as a whole. Some newer engines have a simplex roller chain and if the quality is there, time will give the verdict on that scenario for durability. Owned a 123 body Mercedes Benz 300D coupe diesel 5 cylinder which had the duplex chain and it was still just fine with close to 500,000 miles, a belt would never get there.