Just wondering what you all would recommend for a synthetic oil to use in my '98 Volvo V70. The care is non-turbo, half highway - half city, fairly gentle driving. I'm currently using M1 5W30 for the summer and wondering if this is a good oil or I should maybe use something else. Keep in mind I live in Canada (AB), so it would need to be available here. I would also like to stay with the 7,500km OCI I have been following. FYI - I have been using either M1 OW40 or Syntec 0W30 for the cold winter months. Thanks in advance for all the advice......